Pectinic acid

[化] 果膠酯酸

?? 詞語組成解析

acid ['?s?d]
adj. 酸味的;尖刻的;酸的;酸性的; n. <化>酸;酸味物質;
acid尖，酸，銳利 →酸；酸的，酸性的

??? 情景例句

If he says he's going to be here, he's here.
假如他說他要來這兒 他就一定會來。
What's your plan for the summer holiday?
暑假計劃干什么？
'I don't know,' I answered, 'Tommy's been to the toilet three times this morning, but I haven't had any change yet!'
“我不知道”，我回答說，“今天上午湯米去了3次廁所了，但我還沒看到硬幣！”
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