1. Adamantane and bicyclo (222) octane are predominantly Chlorinated at the bridgeheads by this procedure.
金刚烷和二环〔222〕辛烷主要是按照这个程序在桥头氯化。
2. Two brigades seized bridgeheads on the far side of the river.
两个旅夺取了河对面的桥头堡。
3. By March 25 the Anglo-American armies were in possession of the entire west bank of the river and across it in two places with strong bridgeheads.
到3月25日，英美军队已经完全控制了莱因河西岸，在两个地方渡了河，建立了坚强的桥头堡。
4. Colleges and universities are the important bases for personnel training, the important places for the preservation, inheritance, dissemination and creation of advanced culture as well as the bridgeheads for various ideologies'struggle.
高校是人才培养重要基地，是保存、继承、传播和创造先进文化的重要场所，也是各种意识形态斗争的桥头堡。