He did this by training the leggy birds to land on mats on the ground.
He did this by training the leggy birds to land on mats on the ground.
他是这样做的：训练这种长腿的鸟停在地上的垫子上。
He did this by training the leggy birds to land on mats on the ground.
他是这样做的：训练这种长腿的鸟停在地上的垫子上。