不必

• There is no need to immerge further into this topic .
  不必再钻进这个题目里了。
• It wo n't rain : you can leave your umbrella behind .
  不会下雨，你不必带伞了。
• Never a needless jar was made .
  绝对不带半点不必要的刺激。
• Please compose yourself ; there is no need to get excited !
  请镇静，不必激动！
• It is my pleasure . go ahead , please , see you .
  不必客气，请去吧。一会儿见。
• I am not bound to be timid and conventional .
  我不必有什么顾虑，也不必随波逐流。
• These slits do not need to continue .
  这些刻缝不必连续。
• You need not worry about that thing .
  你不必担心那件事。
• Don't worry about me, darling .
  你不必替我操心，亲爱的。