Polybasic acids
[機] 多元酸
?? 詞語組成解析
a. 多元的, 多堿價的\\n[化] 多堿的; 多堿價的; 多元的; 多代的
n. 酸, 酸類；有酸味的東西（acid的復數）
??? 情景例句
I have just one--playing golf. It's expensive, but it's a lot of fun.
我只有一種愛好，打高爾夫球。花費很高，但非常有趣。
Don't forget bring it to him.
不要忘記帶給他。
This echo-location in bats is often compared with radar, the principle of which is similar.
蝙蝠這種回聲定位常常可與雷達相比較，其原理是相似的。