He dived in after her without a second thought.

他不假思索地随她跳入水中。

Then they fire them without a second thought.

然后，他们会不加考虑，就把他解雇。

These little soldiers make this sacrifice without a second thought, as they are driven by instinct alone.

这些小尖兵毫不犹豫做出这样的牺牲，只因本能驱使它们勇往直前。

They usually follow the American Dream without a second thought, just because that's what's expected of them.

他们通常想都不想就追随所谓的“美国梦”，因为这就是他们被寄予的期望。