Add-on extras include bolt-on passenger seats and a spoiler for the front of the car.附加设备包括可用螺栓固定的乘客座椅和汽车前部的一个气流偏导器。

Mr Hand said the company would make further bolt-on acquisitions in the US.汉德先生说, 公司将在美国作进一步的并购。

Vocational training is now part of the curriculum, instead of being a bolt-on extra.现在, 职业培训是教学课程的组成部分, 而不是可有可无的内容。