feet。foot的基本意思是“脚，足”，引申可表示“足部”“底部，底座”“脚步，步伐”等。foot还可以用作长度单位，意思是“英尺”，表示“每英尺”时， foot前加a而不加one。
foot的例句Your feet must be behind the line when you serve.
发球时你的脚必须站在底线的外面。
She shifted her weight from one foot to the other.
她把身体的重量从一只脚换到另一只脚上。
It was the first time I had set foot on American soil.
那是我第一次踏足美洲大地。
You can back up another two feet or so.
你可以再退两英尺左右。
It was the first time I had set foot on African soil.
那是我第一次踏上非洲大地。
