Alkynyl
炔基
🗣️ 情景例句
It's because I have a bad cold.
那是因为我患了重感冒。
I finished working at 5:30 and went home.
我在5:30完成了工作并且回家。
who produced it with a flourish and pointed out a microscopic 'o' beside the time of the arrival of the train at his station;
站长拿着时刻表一挥手，指着那趟列车到站时刻旁边一个很小的圆圈标记。