Ultratrace analysis
[化] 超痕量分析
🧩 词语组成解析
🗣️ 情景例句
What are your major and minor subjects?
你主修和副修什么科目？
She finally began to get angry when Paul didn't arrive.
当保罗没有到达时，她终于开始生气了。
And, because most books were not printed in Braille.
因为大多数的书本没用布莱叶文印刷。