Train safety regulation
[法] 列车安全规则
🧩 词语组成解析
🗣️ 情景例句
Come in, Michelle,
请进 ，Michelle
Then, all of a sudden, it became cloudy and began to rain.
可是突然天就变了，乌云密布并下起雨来。
The hunt went on for several weeks, but the puma was not caught.
搜寻工作进行了好几个星期，但始终未能逮住那只美洲狮。