Envelop curve
[经] 包络曲线
🧩 词语组成解析
envelop
[in'veləp]
vt. 包围，包住;笼罩，遮盖;
curve
[kɝv]
n. 弧线，曲线;曲线状物;弯曲物;[棒]曲线板;
vt. 使弯曲;使成曲线;使成弧形;
vi. 弯曲;弯成曲线，弯成弧形;沿曲线行进;
adj. 弯曲的;曲线形的;
🗣️ 情景例句
He is interested in collecting foreign stamps.
他对收集外国邮票有兴趣。
He has been to America.
他曾去过美国。[表示曾经有过的经验]
Though he managed to take a number of brilliant photographs, he could not stay near the volcano for very long.
尽管他设法拍了一些十分精彩的照片，但他却不能在火山附近停留太长的时间。