1.backed by 由...支持

They're backed by allied warplanes and tanks.
他们受到盟军战机和坦克的掩护DCM9NteKCWrKT。

2.second-in-command 二把手

That airstrike was aimed at killing al-Qaida's second-in-command, but he was not present at the time.
美军那次袭击行动的目的是消灭基地组织的二号人物，不过他当时并没有在村子里DjN-~Ngh[&U8QwdAYR。

3.air strike 空袭

A senior defence official said last night that they would continue the air strikes.
一位高级国防官员昨晚说他们将继续实施空袭qZGU+7dPxXpcgJZbpsr。

4.missile attack 导弹袭击

A missile attack by a US drone aircraft has killed at least 15 people in north-west Pakistan, officials say.
美国一艘无人战机在巴基斯坦西北部进行导弹袭击，造成至少15人死亡jehq%OElsbdT[Tu。