向导慢慢地领路通过关隘的狭口。
我们不得不迫使管子通过一个狭口。
We had to force the pipe down a narrow hole to get it through.
作为狭口蛙的一种，它们不经历蝌蚪阶段，其幼体在卵内就完全发育成形。
Like many of the Microhylidae family, these frogs bypass the tadpole stage, developing fully within the egg.
该体系包括大沽河-洋河潮控三角洲和与狭口海湾密切相关的涨、落潮流三角洲，潮流作用在各三角洲的形成过程中为主要的沉积动力。
The Dagu-Yanghe tidal delta, a facies system, is formed on the west side of Jiaozhou bay, where the river mouth bar and interdistributory bay are the major sub-facies.
该体系包括大沽河-洋河潮控三角洲和与狭口海湾密切相关的涨、落潮流三角洲，潮流作用在各三角洲的形成过程中为主要的沉积动力。
The Dagu-Yanghe tidal delta, a facies system, is formed on the west side of Jiaozhou bay, where the river mouth bar and interdistributory bay are the major sub-facies.
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