工程学课程中，热力学是最具挑战性的科目之一。

In engineering courses, ___thermo is one of the most challenging subjects.

我用体温计给孩子量了体温。

I used a ___thermometer to check my child's temperature.

冬天出门时，我总是带着保温杯装热茶。

In winter, I always carry a ___thermos with hot tea inside when going out.