2 sentences

1. 对方露出了破绽，他顺势发动了进攻。

   duì​fāng lù​chū le pò​zhàn, tā shùn​shì fā​dòng le jìn​gōng.

   The opponent showed a weakness, and he took the opportunity to launch an attack.

   Source: Dong Chinese Dictionary

2. 他见对方失去平衡，顺势用力一推，将其摔倒在地。

   tā jiàn duì​fāng shī​qù píng​héng, shùn​shì yòng​lì yī tuī, jiāng qí shuāi​dǎo zài dì.

   Seeing his opponent lose their balance, he took advantage of the momentum to give a hard push, knocking them to the ground.

   Source: Dong Chinese Dictionary