2 sentences

1. 这种酶在高温下会失去活性。

   zhè zhǒng méi zài gāo​wēn xià huì shī​qù huó​xìng.

   This enzyme loses its activity at high temperatures.

   Source: Dong Chinese Dictionary

2. 这个分子的侧链上含有一个具有特定活性的官能团。

   zhè​ge fēn​zǐ de cè​liàn shàng hán​yǒu yī gè jù​yǒu tè​dìng huó​xìng de guān​néng​tuán.

   The side chain of this molecule contains a functional group with a specific activity.

   Source: Dong Chinese Dictionary