Clide
放射性核素浓度
🗣️ 情景例句
I'm retired.
我退休了。
I'm feeling under the weather.
我觉得不舒服。
we quickened our pace and made our way rapidly towards the stream where we hoped the boatman was waiting.
快速地朝深溪边走去，希望船夫还在那儿等着我们。