first gear

lowest gear on a car, bicycle, etc 汽车、 自行车等的最低挡.

fireside, firewood, firework, firing, firing-line, firing-squad, firm, firmament, firmly, firmness, first, first aid, first and foremost, first balcony, first base, first class, first cousin, first degree, first finger, first floor, first lady, first name, first night, first of all, first offender, first officer, first or last, first refusal, first school, first-aid, first-born, first-class, first-day cover, first-footing, first-fruit, first-hand, first-rate, firsthand, firstly, firth,