IP屬地：四川
-
Day 15-18Day 8. Vocabulary 1. turbinen. rotary engine in which the kinetic energy...
-
Day4-6. Space and TimeDay4: Vocabulary: 1. leaningn. a. the act of deviationg from a vertical ...
-
Day 1-3. The Science BookVocabulary: Quote:He asserted that big objects fall faster than little o...