The machine unit is made up of charging bucket, steppedgear, pulverizing knife, gear ring, pulverizing motor, discharging port, fan blade, aggregating box, dust collection box, etc.
该机由加料斗、分级轮、粉碎刀片、齿圈、粉碎电机、出料口、风叶、集料箱、吸尘箱等部分组成。
2
Coming out of the final bend, the runner stepped up a gear to overtake the rest of the pack.
赛跑者绕过最后一个弯道后开始加速，以图超越同组的其他选手。
《牛津词典》
3
Spain stepped it up a gear after halftime and Xabi Alonso came close with a fierce shot from the edge of the area that flashed past the post.