2 sentences

1. 侦察兵在战前对敌方的阵地进行了勘察。

   zhēn​chá​bīng zài zhàn​qián duì dí​fāng de zhèn​dì jìn​xíng le kān​chá.

   Scouts reconnoitered the enemy positions before the battle.

   Source: Dong Chinese Dictionary

2. 工程师在动工前对建筑场地进行了详细的勘察。

   gōng​chéng​shī zài dòng​gōng qián duì jiàn​zhù chǎng​dì jìn​xíng le xiáng​xì de kān​chá.

   The engineer conducted a detailed survey of the building site before construction began.

   Source: Dong Chinese Dictionary