An armpit reading can be obtained by placing the thermometer against the skin under the arm and holding the arm against the chest.
腋下测量一般是把体温计放在胳膊下紧贴皮肤，并把胳膊紧贴胸膛。
2
Put a food thermometer in a glass of water on the middle shelf, where the air temperature is most accurate. Leave it there overnight and take a reading in the morning.