Black market rates
[经] 黑市率
🧩 词语组成解析
black
[blæk]
adj. 黑（色）的;黑色人种的;黑暗的;不加牛奶的;
n. 黑色;黑人;黑颜料;黑暗;
v. 使变黑;抵制;拒绝;使变黑暗;
market
['mɑrkɪt]
n. 交易;市集;需求;交易情况，行情;
vt. 在市场上出售某物;推销;
vi. <美>去市场买东西;
mark(merc-=trade)+et(名词后缀)→市场；市集；交易；出售
n. 比率；价格；等级（rate的复数形式）
🗣️ 情景例句
Here's my ticket and seat assignment.
这是我的机票和座位号。
What kind of grades did you make in college?
你在学院得到什么样的等级？
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。