Parts of the trigger are exchangeable.
发现部件可以互相替换。
But though labour be the real measure of the exchangeable value of all commodities, it is not that by which their value is commonly estimated. It is often difficult to ascertain the proportion between two different quantities of labour.
但是,尽管劳动是衡量所有商品交换价值真正尺度,但
并不是通常用来估计商品价值
尺度。通常很难确定两种不同劳动量之间
比例。