A perturbed expression came over his face.

一种担心的神情流露在他的脸上。

We were all perturbed about him when we heard that he was ill.

听说他病了，我们都很为他担忧。

The perturbed young man finally told the truth.

这个心绪不宁的年轻人最终还是说出了真相。

He apparently was not perturbed by the prospect of a policeman coming to call.

显然 对警察可能会上门来访 他并没有表现得很烦恼

She didn't seem perturbed at the change of plan.

她对改变计划似乎毫不在意。

He apparently was not perturbed by the prospect of a policeman coming to the door.

他显然对警察可能会上门来访并不担心。

Peter was quite perturbed at Randi's behaviour, and threw her out three days later.

彼得对兰蒂的行为非常不高兴，三天后把她赶了出去。

The coupled perturbed Hartree-Fock method is used to calculate.

采用耦合微扰方法进行了计算。

The first hyperpolarizability is studied at HF/6-31G level by coupled perturbed Hartree-Fock (CPHF) method.

采用耦合微扰（CPHF）方法在 HF/6-31G 水平上对巴比妥酸衍生物的第一超极化率进行了计算。