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

You might imagine they are like clouds floating across the sky, or waves on the ocean rising and falling.

你可以把它们想象成漂浮在天空的云朵，或者是海面上起起落落的波浪。

youdao

Forelegs are well covered with abundant curls or waves.

前肢上覆盖着丰富的卷毛或波浪状的毛发。

youdao

The navigator also had to add any movement of the ship to the side caused by waves or the wind.

VOA: special.2009.12.23

Just like we see destructive interference with water waves or with light waves, we can also see destructive interference with orbitals.

就像我们看到水波,和光波的相消干涉，我们也可以看到轨道的相消干涉。

麻省理工公开课 - 化学原理课程节选

And so there are only two kinds of waves that can exist on this violin string, standing or traveling.

由于这只有两种波,可以存在在这条弦上，驻波或行波。

麻省理工公开课 - 固态化学导论课程节选

He leans forward, he rolls his eyes or waves a finger in righteous anger.

FORBES: Inside Forbes on Fox

Often, the works featured repetitive clusters of stylized foliage or waves that conveyed a sense of texture, even perspective.

CNN: When Bali Cast A Special Spell

They have designed a smartphone app which plays sounds such as birds in woodland or waves lapping against the shore.

BBC: Can you control what you dream?