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- It is necessary that he be sent there at once. 有必要馬上派他到那里去。
- Please, don't extract the tooth unless it is absolutely necessary. 除非有必要,請你不要拔牙。
- It is haram (unlawful) for a non-mahram Muslim male and female to indulge in long conversations with each other unless it is necessary for education or for business. 對于“非親”穆斯林男女來(lái)說(shuō),除了因為教育或生意之必要以外，沉湎在相互長(cháng)談是屬于 “非法”。
- I think it is necessary to learn science. 我認為學(xué)科學(xué)是必要的。
- Sometimes it is necessary to trim those policies. 有時(shí)需要改變原先制定的那些政策。
- Iron corrodes unless it is greased or kept clean. 如果不涂油或保持清潔鐵便會(huì )腐蝕。
- I must do it because my conscience tells me it is necessary. 我必須做這件事，因為我的良心告訴我需要這樣做。
- Unless it is solved,victory is out of the question. 這個(gè)問(wèn)題不解決，戰爭的勝利是無(wú)從說(shuō)起的。
- A man can not ride your back unless it is bent. 你的腰不彎，別人就不能騎在你的背上。
- It is necessary to get rid of bureaucratic practices. 必須清除官僚習氣。
- Do not change lanes unless it is safe to do so. 除非情況安全,否則不得轉換行車(chē)。
- We won't go on a picnic unless it is fine today. 除非明天天晴,不然我們就不會(huì )野餐了。
- It is necessary to remove plaque by brushing one's teeth. 需刷牙以去除牙斑。
- Wood burns well unless it is wet. 木頭容易燃燒，除非是水濕了。
- Unless it is signed,a cheque is invalid. 支票除非簽了字;否則 是無(wú)效的.
- It is necessary to root out corruption in government. 鏟除政府內部地腐敗現象很有必要。
- It is necessary that he (should) sort out the information for my reference. 他有必要整理些資料供我參考。
- It is necessary that we are ready by seven. 我們7點(diǎn)以前準備好是必要的。
- This building will go to rack and ruing unless it is repaired. 除非這幢大樓進(jìn)行修繕，不然就要倒塌了。
- It is necessary to delimit the anomaly clearly. 清楚地圈定異常是必要的。
