Empretron
汞弧离子管
🗣️ 情景例句
A house, a car and a family, what else could one want?
一所房子，一辆车子和和个家，除此之外，夫复何求？
The packing must be strong enough to withstand rough handing.
包装必须很坚固，能承受野蛮装卸。
Built in 1885, it was the oldest car taking part.
该车造于1885年，是参赛车中最老的一辆。