2 sentences

1. 这种物质具有很强的放射性。

   zhè zhǒng wù​zhì jù​yǒu hěn qiáng de fàng​shè​xìng.

   This substance is highly radioactive.

   Source: Dong Chinese Dictionary

2. 科学家在样本中发现了微量的放射性物质。

   kē​xué​jiā zài yàng​běn zhōng fā​xiàn le wēi​liàng de fàng​shè​xìng wù​zhì.

   Scientists discovered trace amounts of radioactive material in the samples.

   Source: Dong Chinese Dictionary