Pentamethylene oxide

[化] 氧己環

?? 詞語組成解析

pentamethylene
n. [化]環戊烷
oxide ['ɑksa?d]
n. [化]氧化物;

??? 情景例句

How many people are there in your family?
你家里有幾口人?
Excuse me for a moment.
失陪一會兒。
In the pioneering days, however, this was not the case at all.
然而,在登山運動的初期,全然不是這種情況。
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?? 更多 P 開頭的單詞

pfx
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