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For a long time, bacteria have been fighting back.一直以来细菌都在进行反击
fight back从不利的位置反击； 反击； 抵抗
Don't let them bully you. Fight back!
别让他们欺侮你.
He put up a good fight against his sickness.
他努力奋斗以抵抗病魔。
Back in the lab, he needs to find out why.回到实验室里，他得找出原因
find out发现；找出来；揭发
We must find out the customs of other countries, so that they will not think us ill mannered.
我们必须知道别的国家的习俗，免得他们会认为我们是没有礼貌的。
Find out what the conditions of the contract are.
弄清楚合同的条件是什么。
