Fissurae sterni
[医] 胸骨裂
🗣️ 情景例句
But now ...
但是现在……
How long does it take for a letter to get to California ?
一封信到加利福尼亚要花多长时间？
Similarly, our own present primitive chemical rockets, though good enough to orbit men,
同样，我们目前使用的原始化学火箭，虽然可以把人送入轨道，