1. The mechanic should sit down among levers, screws, wedges, wheels, etc.. 机修工应该坐在杠杆、螺丝钉、楔子、轮子等中间。
2. If the light was kept steady, the dolphins were supposed to press the levers in reverse order. 如果光线保持稳定，海豚应该以相反的顺序按压杠杆。
3. Robert Fulton once wrote, "The mechanic should sit down among levers, screws, wedges, wheels, etc." 罗伯特·法欧特曾经写道：“一个技师会坐在杠杆、螺丝钉、楔子、轮子等中间。”
4. Local officials are using the levers that are available to them to safeguard residents' health in the face of a serious threat. 面对严重威胁，地方官员正在利用现有手段保障居民的健康。
5. The levers and light were set up in exactly the same way except that this time it was only Doris who could see the light indicating which lever to press first. 杠杆和光的设置完全一样，只不过这次只有多莉丝能看到先按哪个杠杆的灯的指示。
