Definition: If two things touch, they are so close to each other that there is no space between them. Level: B2
这两根电线绝不能接触。
These two wires must not ___touch.
突然，轮子接触到了地面。
Suddenly, the wheels ___touched the ground.
请确保金属部件彼此不接触。
Please ensure that the metal parts do not ___touch each other.
