Then, for reasons anthropologists debate long into the night, our hominid ancestors stood upright, which was the bodily equivalent of tipping a bridge on end.
然而，由于各种原因，人类学家对此构造的看法存在很多争议。我们的祖先直立背部行走，这就如同拱形桥梁从一头倒塌。
The flaps can be adjusted to maximize lift on the wing's lower end, generating a lot of power, and to reduce it up top, generating less heeling, or tipping, force.
通过调整襟翼，可使翼帆低端的升力达到最高，从而产生大量动力，并减少上端升力，产生较少的侧向力。
This was clearly a tipping point for generation, but it does not represent the end state or final estimation of value to be realized.
这是生成技术的一个转折点，然而却还不能代表最终的价值所在。
The Chinese people have happily put an end to tipping.
中国人有幸废除了小费。
The Chinese people have happily put an end to tipping.
中国人有幸废除了小费。
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