attentively

The students listened attentively as the professor explained the complex theory.

(Chinese) 当教授解释那个复杂的理论时，学生们专心地听着。

She watched the master craftsman attentively to learn the secret of his technique.

(Chinese) 她专注地观察着那位大师级工匠，以学习他的技艺秘诀。