英语学的好，学的快，需要大量可理解性输入
目前是广告占位区域
What's this?
It's an electronic lock.
擦过失败What's this?
It's a door handle.
What's this?
It's a door closer.
What's this?
It's a hinge.
What's this?
It's a latch.
What's this?
It's a padlock.
What's this?
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