3 sentences

1. 他胸有胜算，对这次竞标志在必得。

   tā xiōng yǒu shèng​suàn, duì zhè cì jìng biāo zhì​zài​bì​dé.

   He is confident in his chance of success and is determined to win this bid.

   Source: Dong Chinese Dictionary

2. 这些企业正在为获得政府合同而激烈竞标。

   zhè​xiē qǐ​yè zhèng​zài wèi huò​dé zhèng​fǔ hé​tong ér jī​liè jìng biāo.

   These companies are bidding fiercely for government contracts.

   Source: Dong Chinese Dictionary

3. 物竞天择是自然界演化的基本法则。

   wù jìng tiān​zé shì zì​rán​jiè yǎn​huà de jī​běn fǎ​zé.

   Natural selection is the fundamental law of biological evolution.

   Source: Dong Chinese Dictionary