The gates opened and the crowd surged forward.

大门打开了，人群向前涌去。

《牛津词典》

Six South Koreans were killed when the North opened the gates to a dam near the border, flooding the banks of a river shared by both sides.

VOA: standard.2009.10.15

Each morning as the sun comes up, the gates are opened and the children flood out literally by the thousands to begin that long walk home.

NPR: Lost Generation Grows in Uganda

This was intervened and prevented by a relative who happened to be a physician, or else the flood gates would have opened in the brain.

FORBES: Medicine in 2012- You, the ipatient, and Your Doctor

The gates can be opened for access by the emergency services and the gating orders must be reviewed every two years.

BBC: Nottinghamshire alley gating scheme may be expanded