4. It is (not) necessary to...……是(沒)有必要的.
1) I think it is necessary to look before you leap. 我覺得三思而后行是有必要的.
2) When invited, it is not necessary for you to bring anything with you. 去做客不一定非要帶禮物.
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4. It is (not) necessary to...……是(沒)有必要的.
1) I think it is necessary to look before you leap. 我覺得三思而后行是有必要的.
2) When invited, it is not necessary for you to bring anything with you. 去做客不一定非要帶禮物.