To make an electromagnet you need to send a current through the wire.
为
成
磁体你需要对金属线送
。
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China will help foreign trade enterprises through current challenges and maintain steady and high-quality growth of the sector to stabilize the economy, industry chains and supply chains, according to a circular released by the State Council on May 26.
5 月 26 日,国务院办公厅印发《关于推动外贸保稳提质的意见》,帮扶外贸企业应对困难挑
,
进
口保稳提质任务目标,助力稳
济稳产业链供应链。
Inventing a viable electric light was hard, I mean, this is the typical incandescent design, which just involves passing electric current through a material making it so hot that it glows, less than 5% of the electrical energy comes out as light.
发明一种可行的电灯是很困难的, 我的意思是, 这是典型的白炽灯设计, 只需让电流通过某种材料,使其变得非
热,从而发光,只有不到5%的电能以光的形式
。
Sure, and as it happens, my biological sister, who lives in the States, lives in Colorado, has met her current boyfriend through online dating, and they've been together for several years now, in fact, and they're quite happy together.
当然,巧的是,我亲妹妹住在美国,具体在科罗拉多州,她就是通过网络交友认识了
在的男朋友,他们在一起已
好几年了,
际上,他们非
幸福。
济学人 Science and technology