threshold

閾値、しきい値

何かが起こるために、達するか超える必要がある水準。

やさしい英語で： The level that must be reached or passed before something happens.

• She has a high pain threshold.
• The temperature passed the threshold for opening the valve.
• Lower thresholds would cause more frequent warnings.

使い方： threshold for something (The threshold for an automatic warning is quite low.)

類義語： limit, trigger point

よく使う表現： pain threshold, above the threshold, threshold for something, income threshold

敷居

戸口の下にあり、通るときにまたぐ木や石の細長い部分。

やさしい英語で： The strip of wood or stone at the bottom of a doorway that you step over.

• He stepped over the threshold.
• A cat was sleeping on the threshold.
• The wooden threshold needs replacing.

類義語： doorsill

よく使う表現： cross the threshold, on the threshold, step over threshold

滑走路末端

滑走路で、着陸に使える区域が始まる地点。

やさしい英語で： The point on a runway where the area used for landing begins.

• The aircraft passed over the threshold.
• White markings show the runway threshold.
• The pilot could see the threshold lights through the rain.

よく使う表現： runway threshold, displaced threshold, threshold lights