观察 + Object
观察 (guānchá) means "to observe" or "to watch carefully." It implies deliberate, attentive examination of something over time. It is used in both scientific contexts and everyday speech, as in 观察星星 (to observe the stars).
科学家们花了三年时间观察这种鸟的习性。
kēxuéjiāmen huā le sān nián shíjiān guānchá zhè zhǒng niǎo de xíxìng.
The scientists spent three years observing the habits of this bird species.
老师让学生仔细观察实验中的变化。
lǎoshī ràng xuéshēng zǐxì guānchá shíyàn zhōng de biànhuà.
The teacher asked the students to carefully observe the changes in the experiment.
他喜欢坐在公园里观察来来往往的人。
tā xǐhuān zuò zài gōngyuán lǐ guānchá láilái wǎngwǎng de rén.
He likes to sit in the park and watch people come and go.