airtight GRE专八

The police verified that she had an airtight alibi.

警方查明她有着无可击的不在犯罪现场的证据。

Biscuits will stay crisp if you keep them in an airtight tin.

如果你把饼干放到一个密闭的铁罐里, 它就会保持松脆。

Applicable to acid (except vaporish acid),alkali, ammonia, vapor, oil, organic solvent ,chemistry corrosiveness, filling airtight of rotary pump.

适用酸（除发烟硫酸外）碱，，氨，蒸气，油品，有机溶剂，化学介质的各种旋转泵，阀门的填料密封。

The article introduces a fire autoalarm which can be used in large airtight oil depot or fuel storehouse.

摘要文章提出了一种大型密闭油库，密闭燃油机房等场所用到的火灾自动报警装置。