题目内容
v. to close or join together the two parts of sth.; to become closed or joined together
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v. to make sure that people obey a particular law or rule
n. the quality of doing sth. well with no waste of time or money
n. a device containing paper, sand, chemicals, etc. that a liquid or gas is passed through in order to remove any materials that are not wanted;
v. to invite people to eat or drink with you as your guests, especially in your home; to interest and amuse sb. in order to please them
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