容许电压损耗的英文：
allowable voltage loss

allowable是什么意思：
adj. 允许的，正当的，可承认的

This agenda does not allow compromise.
这一议程容不得商量。

Allow me to introduce myself.
允许我把我自己向你介绍。

The ship was dry and no liquor was allowed.
船上是禁酒的，不准卖含酒精的饮料。

voltage是什么意思：
n. 电压

surge voltage protector
浪涌电压保护器

voltage variable brightness diode
随电压变化亮度的二极管

That is how voltage is measured.
那就是如何测量电压的方法。

loss是什么意思：
n. 损耗，亏损；丢失；去世；失败；浪费；降低；减少

Depreciation, loss of market, loss of use and other consequential losses of any description.
贬值、丧失市场或使用价值等其他后果损失。

The school was lamed by losses of staff.
学校因教职人员流失而开不了课。

loss and damage or delay of goods.
贷物的损失、损坏或交付延误。