Entoconchidae
内壳螺科
🗣️ 情景例句
And you promised me a surprise.
而且你答应给我一个惊喜。
When Emily came home at three in the morning, her father hit the ceiling.
哎米莉在凌晨2点钟回家时，她父亲大发雷霆。
This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
这种通讯联系要靠21厘米波段，即每秒1420兆周的精确无线电频率。