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1.The world's fastest man, Usain Bolt, ran the 100 meters using 4 strides a second.
stride步幅
He crossed the room in two strides.
他两大步跨到屋子另一头。
2.Each of the ants' feet makes contact with the ground for a very short time.
make contact with 接触
They managed to make contact with the British consulate in Lyons.
他们设法与英国驻里昂领事馆取得了联系。
