Vlf
甚低频
🗣️ 情景例句
The work is in full swing.
工作正在全力进行。
How about feed-back from your retailers and consumers?
你们的零售商和消费者的反映怎样？
Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available.
如果有相配的电压，可以煮少量水的便携式热水装置是有用的。