You have to duck down here.

在这儿你要低下头。

youdao

I especially liked the pillows, which were soft duck down.

我尤其喜欢枕头，好松软。

youdao

The mice learned to associate the tone with the shock and quickly became conditioned to duck down and remain motionless when they heard the tone, in the same way they would if a predator appeared.

老鼠懂得把声音联系到一起，当它们听到声响，它们快速地躲藏起来一动不动，当捕食者出现时它们也会有相同的举动。

youdao

Bend your knees and duck down, rolling your head in a 'U'shape under the punch from 'inside' to 'out.

BBC: DEFENCE

Mussina would face away from the runner, duck down, and look behind him to gauge where the runner stands.

WSJ: Derek Jeter's Jump Throw, Adrian Beltre's One-Knee Home Run, Robinson Cano's Cross-Body Throw, James Shields's Crouching Pickoff Move: Baseball's Signature Moves

"When their heads come in I probably need to duck mine down a bit so they won't headbutt me in the face, " he said.

BBC: Gavin prepared for rough tactics