Ecarinate
无隆线的, 无龙骨状突起的
🗣️ 情景例句
And if I think about it long enough, you never know ...
如果我一直考虑下去的话 ，说不定……
It's only a suggestion, you don't have to take it.
这只是一个建议，你可以不听。
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，