2 sentences

1. 这种气体对人体是无害的。

   zhè zhǒng qì​tǐ duì rén​tǐ shì wú​hài de.

   This gas is harmless to the human body.

   Source: Dong Chinese Dictionary

2. 不管怎样，这都是完全无害的。

   bù​guǎn zěn​yàng, zhèi dōu shì wán​quán wú​hài de.

   Either way, it's entirely harmless.

   Source: OpenSubtitles