这钻机有变速控制。The drill has variable speed control.该装置本身就在车子正下方，几乎与变速杆处于同一直线上。The device itself was right under the vehicle, almost in line with the gear lever.你拐角时要换挡变速.You have to shift as you drive around the corner....

“变速”的英语可以翻译为：change speed，shifting，variable speed，varying velocity，shift ...

“变速”的拼音为：biàn sù...