In some sense, what he says is right.
In some senses, it was a wasted effort.
in some sense 和 in some senses 都见过,到底哪个对?
in some sense 和 in some senses 都可以说,但含义有区别:
in some sense 的意思是“从某种意义上说”,其中的 some 后接单数名词,意思是“某一”“某种”。
in some senses 的意思是“从某些意义上说”,其中的 some 后接复数名词,意思是“一些”“某些”。
In some sense, what he says is right. 从某种意义上来讲,他说的是对的。
In some senses, it was a wasted effort. 从某些意义上说,这是白费力气。