Vacuo
n. 真空
🗣️ 情景例句
She tends to talk too much.
她有饶舌的倾向。
Please quote us your price on FOB basis, indicating the postage for dispatch by parcel post to Dalian via Tianjin.
请报FOB价，注明邮寄包裹途经青岛至大连的邮资。
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。