题目内容
n.a straight line going from one side of a circle or any other round object to the other side, passing through the centre
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n. a sum of money that is paid into a bank account; v.to put money into a bank account
n. a state of not being certain about what is happening, what you should do, what sth. means, etc.
prep. about sth.; involving sb./sth.
v.to change food after it has been eaten into simpler forms that the body can use; to think about sth. so that you fully understand it
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