保证是的英文：
be warranted to be

参考例句：
  • I wager that it shall be so.
    我保证它会这样。
  • Measures must be taken to insure traffic safety.
    必须采取措施保证交通安全。
  • A balanced diet is an insurance against malnutrition.
    均衡的食谱是防止营养不良的保证。
  • This food is guaranteed additive-free, ie The manufacturer officially promises that it contains no additives.
    该食品保证不含添加剂。
  • Progress is the activity of today and the assurance of tomorrow.
    进展即今日的活动和明日的保证。
  • To stimulate your appetite and digestion and wish you good health are the guarantee of our restaurant.
    开胃消食，祝君健康——本酒家的保证。
  • [C](fml)formal promise or guarantee,esp in writing
    正式的承诺或保证(尤指书面形式)
  • The doctors were zealous in their efforts to ensure the survival of premature babies.
    医生们在努力保证早产婴儿成活方面热情很高。
  • The maker guarantees this hair dye to stay on three weeks.
    制造商保证染发剂使用后的有效期间为三星期。
  • He had promised that he would be with his sister through fair and foul.
    他保证不管在什么情况下都要和他妹妹在一起。
warranted是什么意思：
adj. 担保的，保证的
v. [warrant] 的过去分词形式；批准，保证
  • be arrested on a warrant
    根据逮捕证被捕
  • The law warrants this procedure.
    这一程序是法律批准的。
  • This inference is warranted by the facts.
    这一假设得到事实的证明。
  • A refinement of the calculation is warranted.
    计算的精度是可靠的。
  • Equipment is allocated by warrant.
    设备已经按照令状分配好了。

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