桥头堡的英文：
bridgehead

By dusk the Americans had a strong bridgehead on the east bank of the Rhine
到天黑时，美军已在莱因河东岸有了一个坚强的桥头堡。

Bridged bicyclooctanes gave no significant bridgehead substitution
桥二环辛烷不给出有意义的桥头取代。

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。

By dusk the Americans had a strong bridgehead on the east bank of the Rhine
到天黑时，美军已在莱因河东岸有了一个坚强的桥头堡。

My conclusion is that the first goal must be to establish a bridgehead through which men and supplies can be funneled at speed
我的结论是，首先需要建立一个便于迅速运送部队和给养的桥头堡。

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。