Ethylizing
[化] 加四乙铅; 乙基化
🗣️ 情景例句
Done! You and I, Mrs. Stewart.
办到了！ Stewart太太和我，
You need to transfer at central station.
你必须在中央车站换车。
What happened before printing was invented?
印刷术发明以前是怎么一回事？