你: you不必: need not; not have to; not n ...认真: conscientious; earnest; seri ...你不必多事: don't be meddling你不必害怕。: you need not be afraid你不必去了: you don't have to go now你不必先付款: you don't have to pay in advance你不必再等了!: you don't have to wait no more你不必这么做: you don't have to do that你不必做的事: things you don’t have to do或你不能太认真: he-llo-o-o课下你不必擦黑板: you needn’t erase the backboard after class你不必到远处去找: you dont have to look very far你不必感到孤单: you don't have to be alone你不必开口要求: you don’t have to ask me for my hand你不必怕那条狗: you needn't be frightened at the dog你不必说你爱我: you don't have to say you love me; you don‘t have to say you love me你不必为此担心: you don't have to worry about that你不必为那事操心: you don't have to worry about that所以你不必担忧: so there's no need to worry girl这事你不必过问了: you needn't bother about this你不必抄写整篇课文: you need not copy the whole text你不必为孩子们操心: you needn你不必再去考虑第二次: you don`t have to think twice认真: 1.(不马虎) conscientious; earnest; serious 认真的自我批评 an earnest self-criticism; 认真执行政策 carry out the policy conscientiously; 认真的检讨 serious self-critical examination; 认真对待 deal seriously with; take...seriously; 认真思考 ponder deeply; 认真制止 put a firm check on; 严肃认真 earnest and serious; 认真作好出版工作。 be conscientious and make a good job of publishing.2.(当真) take seriously; take to heart 我是说着玩儿的,他就认真了。 i was only joking, but he took it to heart