Rectron
电子管整流器
🗣️ 情景例句
But with only one more year to go, you would be well-advised to finish.
可是只剩下一年了，你要是明智的话就应该学完。
Grasp the nettle and it won't sting you.
困难像弹簧，你硬它就软。
Then knowledge began to be accumulated according to a systematic plan.
于是，知识便开始有系统有计划地积累起来。