Each of their toes is covered with " setae " tiny projections much thinner than a human hair .

它们每个脚趾都附着“刚毛”比人体头发还要细得多的微小突起。

On land , leaf beetles ( gastrophysa viridula ) secrete fluid into hair-like structures called setae on their feet .

生活在陆地的叶甲（gastrophysaviridula）分泌液体到脚上的刚毛（毛状结构）部位。

Young shoots and petioles tomentose , setae slender or absent .

被绒毛的幼枝和叶柄，刚毛纤细的或无。

Forces exerted by the setae and the fluid keep the insects attached to surfaces that they are walking on , but such forces don 't usually act inwater .

刚毛与液体的力量使得甲虫能吸附在行走物体的表面，但在水下是不存在这种力量的。