Because true is not a valid item, the tree grid will skip this invalid child item, which results in nothing happening.

树型网格将跳过这个无效的字条目，这就导致什么都没出现。

youdao

She had been a delicate child and her parents had treated her as an invalid.

她小时候很虚弱，父母就把她当个病人照料。

《牛津词典》

Deta had heard from her lady that a sweet, quaint child was wanted as playmate and schoolmate for the invalid.

迪蒂从她的主人那里听说，需要一个甜美又精怪的孩子做病人的玩伴和同学。

youdao

Yes says corporate IT, but what happens when the child of the employee tries to use the phone to play a game and punches in too many invalid PIN attempts and causes the phone to be locked?

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