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Yaws without clinical manifestations , with positive serology .

无临床症状伴有阳性血清学的莓疹。

Many spirochetes are pathogens causing yaws , syphilis , and relapsing fever .

许多螺旋体是病原体，会导致雅司病（热带肉芽肿）、梅毒、以及回归热等。

Campaigns to wipe out yaws , syphilis , malaria , smallpox and polio required syringes , and many were reused , often with official approval .

消灭雅思病，梅毒，疟疾，天花和小儿麻痹症需要大量注射器，而这些注射器被反复使用，甚至得到了官方认可。

As it flies , the bullet pitches and yaws through the air , and that natural rhythym limits the frequency with which its on-board computer can make course corrections .

空气让飞行的子弹偏移目标而且自然节奏限制了它的频率，车载计算机可以修正它的弹道。