Orthoaluminic acid
[建] 正铝酸
🧩 词语组成解析
🗣️ 情景例句
It's tough getting an O.K. from the boss.
很难从老板那听到声“同意”。
What's the matter with you?
你怎么啦？
But every night he heard the noise upstairs.
但每天晚上他都听到楼上的声音。