2 sentences

1. 评委会对所有参赛作品进行了认真的甄选。

   píng​wěi​huì duì suǒ​yǒu cān​sài zuò​pǐn jìn​xíng le rèn​zhēn de zhēn xuǎn.

   The committee conducted a careful selection of all the entries.

   Source: Dong Chinese Dictionary

2. 他有很强的辨析力，能迅速甄别事情的真伪。

   tā yǒu hěn qiáng de biàn​xī lì, néng xùn​sù zhēn bié shì​qing de zhēn​wěi.

   He has a strong analytical ability and can quickly distinguish truth from falsehood.

   Source: Dong Chinese Dictionary