【涓涓】評論
為什麼不可以使用that呢？
【happyplaykid】評論
原句可以省略以下部份，不影響結構Endo...
【悠悠】評論
what=the thing th☆☆(☆☆☆☆☆)...
【曉月】評論
Endorphins are the thing which the body produces after you get some exercise. These chemicals give you a sense of happiness. = Endorphins are what the body produces after you get some exercise. These chemicals give you a sense of happiness.
【Mi de Chen】評論
本題考複合關係代名詞「what」與一般關係代名詞不一樣的地方在於