Polyyne
聚炔烴
??? 情景例句
The wristband. Something old?
腕帶。舊的東西，
In the world, who knows not to swim goes to the bottom.
處世似游泳，不會(huì)即下沉。
Although we can't see these atoms, they really do exist.
雖然我們看不見原子，但它們的確存在。