This offer remains open until 10th February, beyond which date the terms and prices should be negotiated anew.
此盘有效期至2月10日,超过此期限条件及价格需重新协商。
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。