ascendancy [ascend v. 登高；-ancy=>“the quality or state of being ascended 被送上高处的形势或状态”→]n. domination; controlling influence 优势; 支配地位 / Strong minds have undoubtedly ascendancy over the weak ones. 才智高的人比才智低的人拥有无可置疑的优势。/The Carthaginians challenged the ascendancy of Rome.迦太基人对罗马的支配地位提出了挑战。

byoyancy [ byoy v. 使浮起；-ancy=>“the quality of buoying or being buoyed使物体浮起或能上浮的性质”. the power to float or keep things float 浮性；浮力 /Salt water has greater byoyancy than fresh water. 咸水比淡水浮力大。

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