Prinipal strain
[机] 主应变
🧩 词语组成解析
[机] 头, 支配者; 主要的, 第一位的
strain
[stren]
vt.& vi. 拉紧，拉伤;用力拉;
n. 血统，家族;性格，脾气;语气;一段音乐;
vt. 拉紧，拽紧或扯紧;尽量使力;扭伤;歪曲;
vi. 不懈;受到强大的压力;拉紧，紧绷;
strain拉，压 → 尽力拉；工作过度
🗣️ 情景例句
Her boyfriend couldn't provide her with a sense of security.
她的男朋友无法给予她安全感。
How long will you remain there?
你将会在那里逗留多久？
The currents of air that the walls of the ship direct upwards, as well as in the line of its course, are enough to give the great bird with its immense wings sufficient sustenance and progress.
沿船体的上升的气流和沿航线向前的气流给这种巨翼大鸟以足够的浮力和推力。