chronograph wheel friction foot

例句：

1. 1. The chronograph is a watch that records the passage of time.
   计时表是一种记录时间的手表。
2. 2.He bought a new chronograph for his birthday.
   他生日时买了一块新的计时表。
3. 3. The chronograph was used to measure the speed of the car.
   计时表用于测量汽车的速度。
4. 1. The car has four wheels.
   这辆车有四个轮子。
5. 2. The wheel on the bicycle is flat.
   自行车的轮子是平的。
6. 3. The wheel is turning slowly.
   轮子正在慢慢地转动。
7. 1. There is friction between the two pieces of wood.
   两块木头之间有摩擦。
8. 2. The friction between the two surfaces caused the wheel to slow down.
   两个表面之间的摩擦导致轮子减速。
9. 3.The friction between water and glass is very low.
   水和玻璃之间的摩擦力非常低。
10. 1. She stepped off the bus and walked to the door.
    她下了公交车，走到门口。
11. 2. The footsteps of the soldiers were heard in the distance.
    士兵们的脚步声在远处传来。
12. 3. The foot of the table is covered with dust.
    桌子的底部覆盖着灰尘。