A keel also provides weight low under the water to lower the boat's center of gravity below the waterline, which is needed so that the boat bobs back upright if knocked over by wind or waves.

龙骨同时也增加了船只的底部重量，从而将船只重心降到吃水线之下，而这对于船只在被风浪打翻时能够得以及时回正是十分必要的。

youdao

They only look at a tiny fraction of the bits and bobs and bases that make up your genetic code.

它们看起来仅仅是组成你遗传密码的那些碱基的极小一部分。

youdao

The hairstyles range from pink Afros to black bobs to side partings and so on.

主人把它各式各样发型的视频传到YouTube，有粉色非洲爆炸头、黑色波波头和边分头等等，这个毛茸茸的小东西很快赢得了不少粉丝。

youdao

Maybe organizers should change the name of the awards to the "Bobs" as Schneider and his band had ten wins this year.

VOA: special.2010.04.02

He will receive a first-name-only invitation to have dinner at a staff table, which will then quietly appear under the door of one of the other Bobs, and no one will spot the substitution.

NEWYORKER: Stone Mattress

She selects one of the thinner but still substantial Bobs, glides close to him, raises her eyelids, and lowers them again.

NEWYORKER: Stone Mattress

Above him, the moon persists in the sky despite the growing sunlight, making a silhouette of a golden eagle as it bobs up and down, riding warm currents in the air.

BBC: The road to Hollywood, California