limit case的用法和樣例：
例句
- This is an extreme case, generally complete extinction does not occur.
這是一種極限情況，一般說(shuō)來(lái)，并不致發(fā)生完全熄火。 - We can approach the limiting case of free propagation by allowing the aperture dimensions to increase indefinitely.
讓孔的線(xiàn)度無(wú)限增大，我們就能趨近于自由傳播的極限情況。
