阳台或者门廊应该至少有两米深，不然就用不上。
A balcony or porch needs to be at least 6 feet (2m) deep or it won’t be used.
The mining industry is not just about digging holes in the ground; it's about unlocking the Earth's potential.
You can't build an empire without making a few enemies along the way.
化学是在分子水平上操纵物质的艺术，而催化是其最强大的画笔。