一般来说，只有少数几种常用的抗力机制，单独或联合使用，确保横向稳定性。

In general, there are only a few mechanisms commonly used, alone or in combination, for assuring lateral stability.

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也就是说，缺乏横向稳定器尾节，所以研究人员可以测试的理论，这些成分在跨音速的速度在稳定问题的关键因素增长约0.9马赫。

That is, the tail section lacked horizontal stabilizers, so researchers could test a theory that those components were a key factor in stability problems at transonic speeds up to about Mach 0.9.

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横向比较同界出生人口，湿疹和鼻炎的发病率保持稳定。

Across birth cohorts, the rate of eczema and rhinitis remained stable.

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