the briefest glimpse could give warning of an attack.一闪即逝的影子都可能是攻击的前兆

give warning警告(预告)

The black clouds gave warning of an approaching storm.

乌云是暴风雨将要来临的前兆。

The chital must detect their enemy before it takes them by surprise.斑鹿必须在遭遇突袭前先侦测到敌人

by surprise突然(冷不防；出其不意地)

Her suggestion fairly took me by surprise.

她的建议真叫我大吃一惊。

Her sudden resignation took us all by surprise.

她突然辞职，我们都为之愕然。

The jungle is full of distraction.身处丛林很容易分心

full of充满 ...

She is always full of whims and fancies.

她老是充满怪念头。

He walked with a stride full of purpose.

他迈着坚定的步伐向前走。

相关短语:make full use of充分利用

You shall make full use of these materials.

你应该充分利用这些材料。

Make full use of your time to learn more knowledge.

充分利用你的时间去学习。