| 单词 | acute angle |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔angle of attack〕The acute angle between the chord of an airfoil and a line representing the undisturbed relative airflow.攻角，迎角，冲角：机翼弦和代表相对稳定气流的线所形成的锐角美国传统〔cosine〕In a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse.余弦：直角三角形锐角边的边长与叙边的比美国传统〔sine〕In a right triangle, the ratio of the length of the side opposite an acute angle to the length of the hypotenuse.正弦：在一个直角三角形中，锐角所对边长度与斜边长度之比美国传统 |
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