per unit

• adv. 每单位

例句

用作副词 (adv.)

1. The current is the charge flow per unit time.
   电流是每单位时间流动的电荷。
2. Perhaps a key adaptive advantage of the angiosperm is their ability to construct wood with much less expenditure of energy per unit weight.
   也许被子植物适应优势的秘诀就在于它们有能力形成每单位重量的木材可支付少得多的能。