2 sentences

1. 这项投资带来了巨大的经济效益。

   zhè xiàng tóu​zī dài​lái le jù​dà de jīng​jì xiào​yì.

   This investment has brought about huge economic benefits.

   Source: Dong Chinese Dictionary

2. 我们应该设法提高办公室的工作效益。

   wǒ​men yīng​gāi shè​fǎ tí​gāo bàn​gōng​shì de gōng​zuò xiào​yì.

   We should try to improve the effectiveness of office work.

   Source: Dong Chinese Dictionary