He squeezed through a narrow opening in the fence.

他从围栏的一个狭窄缺口挤了过去。

《柯林斯英汉双解大词典》

A narrow opening, such as a crack or fissure.

裂缝：如裂缝或缝隙之类狭窄的裂口。

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The Stork brought her food. This time, however, it was served in a tall, thin jug with a narrow opening at the top.

鹤端上了食物。然而这次食物盛在又细又高的罐子里，灌口很窄。

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It sounded like too many other venture startups looking to find a narrow opening between Facebook and Foursquare.

NEWYORKER: No Death, No Taxes

PORTLAND, Ore. (AP) Portland firefighters cut a hole through concrete and used an air bag and a soapy lubricant to free an Oregon woman who fell and became stuck in a narrow opening between two buildings Wednesday morning.

NPR: Rescuers Free Woman Wedged Between 2 Buildings

"That's a very narrow opening, " says Bergman.

FORBES: Bottled up