Semigel
半凝胶
🗣️ 情景例句
What's the weather like in Japan this time of year?
现在日本的天气怎么样？
Could you hold the door open, please?
请让门继续开着好不好？
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。