Come back up, and lock the knees in towards the centerline.

回来，膝盖固定在中心线的位置。

Red Easter eggs are sometimes served along the centerline of braided loaf of bread.

红色复活节彩蛋有时会顺着面包的中心线嵌入。

Hug that knee towards the centerline and then take the opposite arm to the back.

抱住膝盖来到中心线的位置，然后把另一只胳膊放到后面。

To be successful in your mission, you have to swim under the ship and find the keel — the centerline and the deepest part of the ship.

要想成功完成任务，您必须游到船底并找到龙骨——船的中心线和最深的部分。