Wire the thermometers up to trigger off an alarm bell if the temperature drops.

把温度计的电线连接上，当温度下降时，就会触发警报。

《柯林斯英汉双解大词典》

Winter closes in and the temperature drops below freezing.

冬天来临，气温降至冰点以下。

《柯林斯英汉双解大词典》

If the temperature drops below zero degree, water will turn into ice.

如果气温降到零度以下，水就会结冰。

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In that situation, their body temperature drops below thirty-five degrees Celsius.

VOA: special.2009.12.30

If the temperature drops below a certain level it sends a signal, 'turn on the heat', and that signal stays on until it gets a negative signal to turn off.

如果温度降到一定程度以下时,探测器会发送一个信号,打开加热器,直到加热器再收到关闭的信号,它就会一直开着

耶鲁公开课 - 生物医学工程探索课程节选

Statistics show only a 10-33% survival rate for adults whose core body temperature drops below 28degC.

BBC: Skier revived from clinical death

When the body's core temperature drops below 95 degrees Fahrenheit, a mild form of hypothermia takes hold.

FORBES: Magazine Article

Modern mattresses and bedclothes trap the heat that the body gives off as its core temperature drops each night.

NEWYORKER: Up All Night