把温度计平置，让红灯照在额头中间直至两道红光会成一点。

Hold the thermometer perpendicular to the middle of the forehead until a single point of light appears.

youdao

把温度计平置，让红灯照在额头中间直至两道红光会成一点。

Hold the thermometer perpendicular to the middle of the forehead until a single point of light appears.

youdao