Once might be happenstance. But this strange extra acceleration was seen subsequently with two other craft.

一次有可能是偶然事件，但是这种奇怪的加速却同样在后来其他两个飞行器上出现。

youdao

The string will say "Aha! I'm going to pull now on this person "because the gravitational acceleration alone is not enough-- I need some extra pull."

绳子会说,“啊哈，这家伙需要我来帮忙拉了“,因为此时只靠重力加速度,不足以提供向心加速度了，需要额外的补充

youdao

An actual number for front sag is less important, especially considering that more bikes come from the factory with extra front sag that helps keep the front tire on the ground under acceleration.

实际上前减震预载不是特别重要，特别是考虑到很多车从工厂出来时有一个额外的前减震下沉，以确保加速是前轮能紧贴地面。

youdao

The acceleration gives you an extra stuff, quadratic in time.

加速度对位移有额外贡献,是时间的二次项

耶鲁公开课 - 基础物理课程节选

Birds were given different colors, squawks and abilities such as extra density, acceleration and the power to lay explosive eggs in the air before winging off their parabolas from the counterforce of laying eggs.

FORBES: Audacious Birds