vocabulary? ?n.(某人掌握或使用的) 詞匯哪审，詞匯量; (某一語言的) 詞匯; (某學(xué)科中所使用的) 詞匯;

There are many different cycles in nature, such as the cycle of seasons.

A cycle is a series of events that repeat, such as the daily cycle of light and dark.

(The time it takes for a?cycle to repeat itself is its period.)? ?一個(gè)循環(huán)重復(fù)自己所需要的時(shí)間是它的一個(gè)周期?

(The number of times a cycle repeats itself within a period of time is its frequency.)? ?一個(gè)周期在一段時(shí)間內(nèi)重復(fù)的次數(shù)就是它的頻率

cycle? ??n.自行車; 摩托車; 循環(huán); 整套磷蜀，整個(gè)系列(如機(jī)器的運(yùn)轉(zhuǎn));

daily? ?adj.每日的; 日常的; 每個(gè)工作日的; 按日的;

The time it takes for a?cycle to a repeat itself is its period? ? ?定于從句，修飾the time 孩饼； it是形式主語亲铡，to repeat itself是真正內(nèi)的主語? ? ? ??it takes a cycle time to repeat itself??一個(gè)循環(huán)重復(fù)自己所需要的時(shí)間是它的一個(gè)周期?

frequency??n.發(fā)生率; 出現(xiàn)率; 重復(fù)率; 頻繁; (聲波或電磁波振動的) 頻率;

The number of times a cycle repeats itself within a period of time is its?frequency.??

the number of times 次數(shù)? ? a cycle repeats itself :cycle名詞? ?在一定時(shí)間內(nèi)才写，不斷重復(fù)的一個(gè)周期的次數(shù)，叫做頻率奖蔓。

The number of times

To evolve means to change or improve over a period of time.

In biology, the theory of evolution says that advanced life forms such as humans have evolved from lower forms of life.

(According to science we have all evolved from simple one-celled organisms.)

(Life forms evolve because they have to adapt in order to survive.)

evolve??v.(使) 逐漸形成赞草，逐步發(fā)展，逐漸演變; 進(jìn)化; 進(jìn)化形成;

biology??n.生物學(xué); 生理;?

evolution??n.進(jìn)化; 演變; 發(fā)展; 漸進(jìn);

advanced? ?adj.先進(jìn)的; 高級的; 高等的; (發(fā)展) 晚期的吆鹤，后期的;

lower??adj.(尤指位于同類物品或成對物品中另一個(gè)的) 下面的厨疙，下方的; 在底部的; 近底部的; 朝海岸的; 低洼的; 向南的;

life forms??n.生物; 活物;

one-celled? 單細(xì)胞的? ? ? ? ? cell? ???n.單間牢房; 牢房; (修道士或修女住的) 小房間; 細(xì)胞;

organism? ??n.有機(jī)體; 生物; (尤指) 微生物; 有機(jī)組織; 有機(jī)體系;

A force of attraction brings two objects closer together, such as the force of gravity.

A force of?repulsion pushes two objects away from each other, such as the force between two?electrons.

(If two people are attracted to each other, they want to be together.)

(Gravity is a force of attraction between two objects with mass.)? ?重力是兩個(gè)有質(zhì)量的物體之間的引力

force? ?n.武力; 暴力; 力; 力量; 強(qiáng)大效力; 巨大影響;

attraction??n.(尤指兩性間的) 愛慕，吸引; 向往的地方; 有吸引力的事; 有吸引力的特征(或品質(zhì)檀头、人);

closer? ??adv.接近; 靠近; 緊挨著; 不遠(yuǎn)地;

repulsion? ?n.嫌惡感; 強(qiáng)烈的反感; 憎惡; 排斥力; 斥力;

electron? ?n.電子;

mass??n.團(tuán); 塊; 堆; 大量; 許多; (常指混亂的) 一群轰异，一堆;? ??重力是兩個(gè)有質(zhì)量的物體之間的引力

To transform means to change from one form into another.

A transformation occurs when an object takes on a new appearance or structure.

(In marriage, a wife's attempt to transform the behavior of her husband is often unsuccessful.)

transform??v.使改變形態(tài); 使改變外觀(或性質(zhì)); 使改觀;

transformation? ?n.(徹底的) 變化岖沛，改觀暑始，轉(zhuǎn)變搭独，改革; (用于南非) 民主改革;

appearance??n.外貌; 外觀; 外表; (尤指突然的) 抵達(dá)，到來; 起源; 出現(xiàn); 首次使用;

structure? n.結(jié)構(gòu); 構(gòu)造; 結(jié)構(gòu)體; (尤指) 建筑物; 精心組織; 周密安排; 體系;

attempt??n.企圖; 試圖; 嘗試; 殺人企圖; (為超越某事物的) 嘗試廊镜，努力;

To?inherit?something means to get it without having to ask or work for it.

A child from a very rich family,? may inherit?a lot of money.

(He inherited a large fortune when his parents died, so he doesn't have to work anymore.) 為什么是money

(Eye and hair color are inherited traits.)

inherit? ?v.繼承(金錢牙肝、財(cái)產(chǎn)等); 經(jīng)遺傳獲得(品質(zhì)、身體特征等); 接替(責(zé)任等); 繼任;

fortune? ?n.(尤指影響人生的) 機(jī)會嗤朴，運(yùn)氣; 大筆的錢; 巨款; (個(gè)人配椭、家庭、國家等的) 發(fā)展變化的趨勢雹姊，命運(yùn)股缸，際遇;

trait? ?n.(人的個(gè)性的) 特征，特性吱雏，特點(diǎn);

inherited?traits.? ?遺傳特征

(To change or improve over a period of time)? ?to? evolve

(To take on a new appearance or a form)? ? to transform

(To receive something without having to work for it)? ? to inherit

(What can breaks things apart?)? ? repulsion

(What is the series of events that repeat itself?)? ? ? a cycle

(What process has a nable of life to become more complex?)? ?evolve

(Days,years and seasons are all examples of what?)? ?cycle

(A good friend of mine has never had to work, because everything he has is inherited.)

(Some people become wealthy by? )? inherit

(What kind of force bring things together? )? ?a force of attraction

(We say that opposites attract. However, in human relationships, though opposites may attract, the relationship may not last long. People who have much in common may not attract each other but may have a longer lasting relationship.)

(Gravity is a force of attraction between two objects with mass. In human interactions, there are also forces of attraction. Two people may find each other attractive. If two people are attracted to each other, they want to be together.)

opposite? ?n.對立的人(或物); 對立面; 反面;

lasting??adj.繼續(xù)存在的; 持久的; 耐久的;

longer? ?adj.(長度或距離) 長的;

attractive? ?adj.性感的; 嫵媚的; 英俊的; 誘人的; 吸引人的; 令人愉快的; (事物) 有吸引力的;

be attracted to? 被吸引