重点讲解：
1. go after 追逐；追求；追击；
He went after the burglars.
他追赶那些窃贼u;yftmR;ndqH&UDr@ZV。
2. put on 增加（体重）；
I can eat what I want but I never put on weight.
我能想吃什么就吃什么，但是体重从来不增加jn2@dCuk-VbpTJE3&b。
3. even though 即使；尽管；纵然；
All the men were being deported even though the real culprits in the fight have not been identified.
尽管真凶尚未查出，所有参与斗殴的男子均被驱逐出境0pqQb2aD#)eN0CP_Q9m[。
4. break down （使）（物质）分解；
The oil is attacked by naturally occurring microbes which break it down.
原油受到了自然产生的分解油类物质的微生物的侵蚀,2sRL&Ux,U。