練習(xí)材料：
Lesson 13-2 The search for oil
?l?sn 13-2 e? s??? f??r ??l
? The geologist needs to know what rocks the drill has reached, so every so often a sample is obtained with a coring bit. It cuts a clean cylinder of rock, from which can be seen the strata the drill has been cutting through. Once we get down to the oil, it usually flows to the surface because great pressure, either from or water, is pushing it. This pressure must be under control, and we control it by means of the mud which we circulate down the drill pipe. We endeavour to avoid the old, romantic idea of a gusher, which wastes oil and gas. We want it to stay down the hole until we can lead it off in a controlled manner.
e? ????l???st ni?dz tu? n?? w?t r?ks e? dr?l h?z ri??t, s?? ??vri s?? ??f(?)n ? ?sɑ?mpl ?z ?b?te?nd w?e ? ?k??r?? b?t. ?t k?ts ? kli?n ?s?l?nd?r ?v r?k, fr?m w?? k?n bi? si?n e? ?strɑ?t? e? dr?l h?z bi?n ?k?t?? θru?. w?ns wi? g?t da?n tu? ei ??l, ?t ?ju????li fl??z tu? e? ?s??f?s b??k?z gre?t ?pr???, ?a?e? fr?m ?? ?w??t?, ?z ?p???? ?t. e?s ?pr??? m?st bi? ??nd? k?n?tr??l, ?nd wi? k?n?tr??l ?t ba? mi?nz ?v e? m?d w?? wi? ?s??kj?le?t da?n e? dr?l pa?p. wi? ?n?d?v? tu? ??v??d ei ??ld, r???m?nt?k a??d?? ?v ? ?g???, w?? we?sts ??l ?nd g?s. wi? w?nt ?t tu? ste? da?n e? h??l ?n?t?l wi? k?n li?d ?t ?f ?n ? k?n?tr??ld ?m?n?.
地質(zhì)學(xué)家需要知道鉆頭已以到達(dá)什么樣的巖層箱锐，因此時常要用芯鉆頭取樣杨伙。這種鉆頭能切割一段光滑的圓柱形巖石梢薪，從中能看出所鉆透的地層。一旦到達(dá)油層晰洒，石油就會由于地下巨大的壓力流到地面上來，這種巨大的壓力來自地下天然氣或水歪赢。這種壓力必須加以控制酷勺，我們讓泥槳順著鉆桿向下循環(huán)，用這種方法來控制壓力膳凝。我們盡量避免使用陳舊天真的噴井方法碑隆，那樣會浪費石油和天然氣恭陡。我們要讓石油留在井下蹬音，直到我們能用一種有控制的方法把它引上來為止。
任務(wù)配置：L0休玩、L3著淆、L4
知識筆記：
單詞與短語
under control加以控制
endeavour to 盡量避免
in a controlled manner 用一種有控制的方法
練習(xí)感悟：這篇練的沒感覺。不熟悉的太多拴疤。
