Tetraoxide
四氧化物
🗣️ 情景例句
It will take a few years for the region to recover economically.
这个地区的经济恢复得花几年的时间。
She wants me to come as often as possible.
她希望我尽可能常来。
An old watch, by contrast,
然而一只老掉牙的手表，