1 . 要花很多年才能恢复自然平衡，因为大自然是脆弱的，很容易被破坏。(It) (汉译英)

2 . Directions: Write the words you have learnt according to the meanings given. The first letter is given.
1. o_________ adv. including everything or everyone; in total
2. a_________ adj. correct and true in every detail
3. s_________ adj. not showing serious thought, feeling, etc. about something
4. d_________ adj. made or formed in a very careful and detailed way
5. u_________ v. experience something necessary or unpleasant
6. s_________ v. divide
7. t_________ v. track down, following something to its origin
8. a_________ v. examine something in order to explain it
9. u_________ n. a revolution
10. d_________ n. an amount of money that is taken off the usual cost of something