Ad substance
[醫] 突觸傳遞物質
?? 詞語組成解析
ad
[?d]
n. 廣告;網球中的優勢分advantage. ad in;
??? 情景例句
She won't be happy when she sees what you've done with your hair.
當她看到你將頭發搞成這個樣了了，就高興不起來了。
There is no royal road to learning.
治學無坦途。
So it became known as the gold rush.
成為廣大為人知的“淘金熱”。