Its natural enemy is adequate practice.

它的天敌是足够的练习。

Custom is the natural enemy of love.

习俗是爱情的天敌。

The natural enemy of the werewolf is vampire.

狼人的天敌是吸血鬼。

The dynamics of the natural enemy community was studied.

研究了棉田天敌群落时序动态。

Their natural enemy was, and is, the Pakistani government.

他们的天地曾经是现在也是巴基斯坦政府。