2 sentences

1. 处理这些复杂的矛盾时，你需要保持心静。

   chǔ​lǐ zhè​xiē fù​zá de máo​dùn shí, nǐ xū​yào bǎo​chí xīn jìng.

   You need to keep your mind calm when dealing with these complex contradictions.

   Source: Dong Chinese Dictionary

2. 在这种关键时刻，必须澄心静虑才能做出正确的选择。

   zài zhè zhǒng guān​jiàn shí​kè, bì​xū chéng​xīn jìng​lǜ cái néng zuò​chū zhèng​què de xuǎn​zé.

   At such a critical moment, one must clear the mind and think calmly to make the right choice.

   Source: Dong Chinese Dictionary