潜水员穿上脚蹼准备下水.The diver put on flippers and was ready to dive.杰瑞德: 快给我潜水镜和脚蹼.Jared : Give my mask and my fins real quick.而假设在奥运会游泳赛事上,让人们自由使用脚蹼.And what would that do to the Olympic Swimming Competition....
有人能想出一种不会破坏生态环境而又能够赶跑蜘蛛的办法吗？Can anyone suggest a method of deterring spiders which is ecologically sound?那蜘蛛的黑色身子有如天鹅绒般光滑.The spider has a velvety black body.科学家们对织网型蜘蛛的兴趣在于构成蛛网的丝线.What interests scientists about web - w...