As chemical precursors stream onto the surface of a rolling metal or plastic substrate, they react with one another to form a network of nanoparticles.
各化学母质流向滚动中的金属或塑料基片的表面，他们互相作用，形成一层纳米级微粒网状结构。
2
The new moon that appeared in late April started the ball rolling in your career, so you should continue following up on any career offers that surface.
上个月下旬的满月使得你的职业生涯出现了一些折腾，所以你应该继续跟进任何和职业有关的状况。
3
Bowling is a sport in which players attempt to score points by rolling a bowling ball along a flat surface, usually a wooden or synthetic surface, either into pins or to get close to a target ball.