Definition: good or quick at noticing things Level: C2
她极其善于观察。
She is extremely ___observant.
作为一名观察力敏锐的老师，她注意到学生何时遇到困难。
As an ___observant teacher, she noticed when students were struggling.
观察力强的保安立即发现了入侵者。
The ___observant security guard spotted the intruder immediately.
