- at a premium非常珍贵， 非常需要， 渴求;
- a while back一段时间之前，不久之前
- a series of一系列;一连串;
- be up in the air在空中
- be in duty bound tov.有义务;
- come down in the worldv.落魄;沦落;
- do well in成绩好，…做得好;
- dig in挖地埋入;挖战壕或类似的工事;全力以赴地做起来;（使）确立牢固的地位;
- have a look看一看;
- in question考虑之中的，被谈论着的;
- in perspectiveadv.正确地，显示在脑海中，符合透视法地;
- in honor为了纪念；向…表示敬意;
- in full swingadv.活跃;蓬勃高涨;
- in flower处于开花期;
- in dribs and drabs在干燥和石膏中
- in disorder混乱，紊乱;步履紊乱;七零八落;
- in combination with与…联合， 与…结合;
- land in（使）在…着陆;（使）处于…中;
- make a pass at通过
- make a difference有作用或影响;
- 双语例句
1、
All free nations have a stake in preventing sudden and catastrophic attacks.
防范灾难性的突发攻击事件,与所有自由的国度休戚相关.
英汉非文学 - 政府文件
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