fence * in +
用柵欄圍起；用籬笆圍起
They fenced the whole garden in.
fence * off +
用柵欄隔開；用籬笆隔開
They fenced off one side of the park to keep dogs out.
file for +
向法院申請 (離婚、宣布破產等)
They filed for divorce after two years of marriage.
filter into +
慢慢走入
The students filtered into the exam room.
filter out of +
慢慢走出
People began to filter out of the theater.
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