certain a.确定的,某一个的,必然的确...I am certain that... 我确信......under certain circumstance 在某种情况下...under certain condition 在某种情况下...I am not certain whether... 我不能确定是否......it is certain that 毫无疑问...,肯定......be certain of 确信...to a certain degree 到达某种程度,在某种程度上...for certain 肯定地...annuity certain and life 定期和终身年金...annuity certain 确定年金,定期年金...certain annuity 一定年金确定年金...certain part of the difference 差额的一定比例数...certain claim 必然要求,确实要求...make certain 确定...payment certain 肯定支付...
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