Some militant groups can be skillful in their use of social media.

一些激进组织可以熟练使用社交媒体。

They were skillful in using tact and tactics.

他们在运用机智和策略上很得当。

He was skillful in mass communications.

他擅长大众传播。

Hence that general is skillful in attack whose opponent does not know what to defend; and he is skillful in defense whose opponent does not know what to attack.

故善攻者，敌不知其所守；善守者，敌不知其所攻。

For Homer was skillful in inventing such poetic fictions and is most sweetly wanton; yet when I was a boy, he was most disagreeable to me.

因为荷马善于创造这种诗意的小说， 并且极其甜蜜地放肆。然而当我还是个孩子的时候， 他对我来说是最不愉快的。