使困難的英文：
toughen

參考例句：
  • A difficult weld
    困難的熔接
  • The Budget gap
    預(yù)算困難
  • Grasp the nettle
    毅然面對(duì)[解決]困難
  • Be in trouble; be in the doghouse;in hot water
    處于困難或危險(xiǎn)中
  • insurmountable difficulty
    不可克服的困難
  • To bear hard upon;press.
    使痛苦不堪對(duì)某人施加困難；逼迫
  • The disabled form a special social group in straitened circumstances
    殘疾人是一個(gè)特殊而困難的社會(huì)群體。
  • to extricate oneself from difficulties
    把自己從困難中解脫出來
  • A recurrent problem [difficulty]
    反復(fù)地發(fā)生的問題[困難]
  • We had great difficulty in breathing, for the air was thin.
    空氣稀薄，我們呼吸非常困難。
toughen是什么意思：
vt.
vi. (使)變堅(jiān)韌,(使)變頑固,使困難
  • He needs a neat diet and plenty of hard exercise to toughen him up.
    他需肉類飲食和大運(yùn)動(dòng)量的艱苦鍛煉使自己強(qiáng)健起來。
  • The company leader said that army life would toughen the recruits up.
    連長(zhǎng)說軍隊(duì)生活可以使新兵鍛煉得更堅(jiān)強(qiáng)。
  • The city council is determined to toughen up the fight against crime.
    市政會(huì)議決心增強(qiáng)與犯罪作斗爭(zhēng)的力度。
  • Reinforced concrete and special trusses have toughened large buildings, but mechanisms that actually reduce the shake from a quake are still relatively new.
    鋼筋混凝土和特殊的桁架已使大型建筑物更堅(jiān)固，但真正能減輕大樓在地震時(shí)搖晃幅度的機(jī)械裝置，倒是近來才出現(xiàn)的。
  • toughened safety glass, whether or not shaped (incl. unframed glass for motor vehicle parts)
    強(qiáng)化安全玻璃,不論是否成形（包括作為機(jī)動(dòng)車部件的未鑲框玻璃）

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