题目内容
n. the state of needing sb. /sth. in order to survive, be successful, etc. ; the fact of being able to rely on sb. /sth.
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vt. to change sth. good into sth. bad, unpleasant, useless, etc.
v. to move or turn around a central fixed point;
n. a loose soft shoe that you wear in the house
n. a large piece of metal or leather carried by soldiers in the past to protect the body when fighting; vt.to protect sb. /sth. from danger, harm or sth. unpleasant
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