Your peripheral vision may not be all that good for watching a fast moving table tennis ball onto a relatively small racket head.
你的余光也未必那么好，能看着一些如此快速运动的小乒乓球到达一个相对较小的拍头上。
The photos show an animal with a relatively small head topped by large fleshy, collar-like fins.
照片中的动物脑袋相对较小，头部下面长了许多像衣领一样的肉鼓鼓的鳍。
The method disturbs the flow pattern relatively less and the water head loses in small.
此补强方法对水流流态干扰较少，水头损失小。
The method disturbs the flow pattern relatively less and the water head loses in small.
此补强方法对水流流态干扰较少，水头损失小。
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