根据这些线索，警察推测小偷可能是熟人。

Gēnjù zhèxiē xiànsuǒ, jǐngchá tuīcè xiǎotōu kěnéng shì shúrén.

Based on these clues, the police infer that the thief is likely an acquaintance.

我只能根据他的表情大概推测一下他的想法。

Wǒ zhǐ néng gēnjù tā de biǎoqíng dàgài tuīcè yíxià tā de xiǎngfǎ.

I can only roughly guess his thoughts based on his expression.

从地上的脚印可以推测，昨晚这里来过不少人。

Cóng dìshàng de jiǎoyìn kěyǐ tuīcè, zuówǎn zhèlǐ láiguò bù shǎo rén.

From the footprints on the ground, one can infer that quite a few people came here last night.