replaceable造句
He would see I was not so easily
replaceable.
他会看到我不是那么容易被替代的。
A person, unlike a machine, is not
replaceable.
人和机器不同, 是不可替代的.
R " is a
replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.
R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.