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1. The machine has a filler opening that can be used to remove small objects from the machine.
这台机器有一个填充开口，可以用来从机器中取出小物体。
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2. The car had a filler opening that could be used to add air to the engine.
汽车有一个填充开口，可以用来向发动机添加空气。
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3. The hole in the wall had a filler opening that could be used to patch up the damage.
墙上的洞有一个填充开口，可以用来修补损坏。