4 sentences

1. 农业在国民经济中的比重正在下降。

   nóng​yè zài guó​mín jīng​jì zhōng de bǐ​zhòng zhèng​zài xià​jiàng.

   The proportion of agriculture in the national economy is declining.

   Source: Dong Chinese Dictionary

2. 私有制在当时仍然占有相当大的比重。

   sī​yǒu​zhì zài dāng​shí réng​rán zhàn​yǒu xiāng​dāng dà de bǐ​zhòng.

   Private ownership still accounted for a considerable proportion at the time.

   Source: Dong Chinese Dictionary

3. 随着经济的发展，第三产业的比重不断增加。

   suí​zhe jīng​jì de fā​zhǎn, dì​sān​chǎn​yè de bǐ​zhòng bù​duàn zēng​jiā.

   With economic development, the proportion of the tertiary industry is constantly increasing.

   Source: Dong Chinese Dictionary

4. 这种金属的比重比水大得多。

   zhè zhǒng jīn​shǔ de bǐ​zhòng bǐ shuǐ dà de duō.

   The specific gravity of this metal is much greater than that of water.

   Source: Dong Chinese Dictionary