Permeater
透氣性測(cè)定儀
??? 情景例句
If you go camping, at night you'll hear all the nocturnal animals.
如果你去野營(yíng)，晚上可以聽(tīng)到動(dòng)物的夜歌。
Empty vessels make the greatest sound.
空桶響聲大。
It is not a simple competition for a fixed amount of food determined by the physical environment,
它已不是為了爭(zhēng)得物質(zhì)環(huán)境所決定的有限食物而進(jìn)行的簡(jiǎn)單競(jìng)爭(zhēng)了，