They are not actively aggressive however they are sneakier.

但是他们并不积极进取他们狡猾。

youdao

Because you never know when someone will be smarter and sneakier than you, that's why.

因为您永远不知道何时会出现比您更聪明的人，这就是原因。

youdao

So here's a sneakier idea: Encourage her to start a blog and post all that fascinating stuff she finds online.

有个小点子：鼓励她开博客然后把网上好玩的东西都放上去。

youdao

Dr. Bernstein says the danger of monitoring kids too closely through technology is that it may make them sneakier.

WSJ: Parents and children meet and clash on social-networking sites

Predators get stronger and prey gets sneakier, predators get smarter and prey gets faster, and so on, to produce the diversity and dynamism of the natural world today.

FORBES: Survival Instinct: Businesses Must Watch Out For Mother Nature

Even sneakier, if surfers do in fact click on one of the advertising banners hoping to go to that site, they are sometimes returned to the original site instead.

ECONOMIST: Hard sell