使困难的英文：
toughen

参考例句：
  • A difficult weld
    困难的熔接
  • The Budget gap
    预算困难
  • Grasp the nettle
    毅然面对[解决]困难
  • Be in trouble; be in the doghouse;in hot water
    处于困难或危险中
  • insurmountable difficulty
    不可克服的困难
  • To bear hard upon;press.
    使痛苦不堪对某人施加困难；逼迫
  • The disabled form a special social group in straitened circumstances
    残疾人是一个特殊而困难的社会群体。
  • to extricate oneself from difficulties
    把自己从困难中解脱出来
  • A recurrent problem [difficulty]
    反复地发生的问题[困难]
  • We had great difficulty in breathing, for the air was thin.
    空气稀薄，我们呼吸非常困难。
toughen是什么意思：
vt.
vi. (使)变坚韧,(使)变顽固,使困难
  • He needs a neat diet and plenty of hard exercise to toughen him up.
    他需肉类饮食和大运动量的艰苦锻炼使自己强健起来。
  • The company leader said that army life would toughen the recruits up.
    连长说军队生活可以使新兵锻炼得更坚强。
  • The city council is determined to toughen up the fight against crime.
    市政会议决心增强与犯罪作斗争的力度。
  • Reinforced concrete and special trusses have toughened large buildings, but mechanisms that actually reduce the shake from a quake are still relatively new.
    钢筋混凝土和特殊的桁架已使大型建筑物更坚固，但真正能减轻大楼在地震时摇晃幅度的机械装置，倒是近来才出现的。
  • toughened safety glass, whether or not shaped (incl. unframed glass for motor vehicle parts)
    强化安全玻璃,不论是否成形（包括作为机动车部件的未镶框玻璃）

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