THERMISTOR, A temperature sensitive resistor whose    热敏电阻，

resistance changes with a change in temperature.        一种电阻值随温度的变化而变化的对温度敏感的电阻。

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THERMOCOUPLE, Two different metal wires joined at        热电偶，

both ends for temperature measurement. When both           用来量取温度，两端相连的两根不同金属导线。当两端

junctions are at different temperatures, an electric     之间有温差时，金属丝内即产生与温差成比例的电流。

current is produced proportional to the temperature

difference.

THERMOSTAT, A component set to operate at a              恒温器，

definite temperature for controlling electric circuits and 用来在一定温度下操作，以控制电路和活门的部件。

valves.

THERMOSTATIC SWITCH, A heat controlled,                  恒温电门，

temperature sensitive switch which opens at a preset        一个热控的、在预定温度断开的热敏电门。

temperature.

THR HOLD, SEE -THROTTLE HOLD                             油门保持，

                                                           见Throttle Hold．

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英汉对照民用航空词典                                   BOEING

THRESHOLD (NO. 1), The bottom part of an opening in 门槛，

a fuselage doorway.                                  机身舱门开口的底部。

THRESHOLD (NO. 2), The approach end of the runway.  跑道头，

                                                     机场跑道到场的一端。