3 sentences

1. 微波是不能穿透金属的。

   wēi​bō shì bù​néng chuān tòu jīn​shǔ de.

   Microwaves cannot penetrate metal.

   Source: CCMatrix

2. 大多数海蛇的尖牙不够长，甚至穿不透一件薄潜水服。

   dà​duō​shù hǎi​shé de jiān​yá bù​gòu cháng, shèn​zhì chuān bu tòu yī​jiàn báo qián​shuǐ​fú.

   The fangs of most sea snakes are not long enough to penetrate even a thin wetsuit.

   Source: CCMatrix

3. 纹身也可能是一个问题，因为它们可能会阻挡光线穿透皮肤。

   wén shēn yě kě​néng shì yī​ge wèn​tí, yīn​wèi tā​men kě​néng huì zǔ​dǎng guāng​xiàn chuān tòu pí​fū.

   Tattoos can also be a problem as they may block the light from penetrating the skin.

   Source: CCMatrix