At the appearance of the enemy, we attacked.

敌人一出现，我们就发起了攻击。

《新英汉大辞典》

We attacked at the appearance of the enemy.

敌人一出现，我们就发起了攻击。

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At the appearance of the eighth leaf primordia, SAM formed a bulge and had more cells.

至第八对叶原基产生后，茎端分生组织才稍微隆起，细胞数目增多。

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President Obama's energetic speech at a community college near Cleveland took on the appearance of a campaign rally.

VOA: standard.2010.01.22

Let's look at the first appearance of Mammon in Paradise Lost.

请看在《失乐园》中贪欲之神第一次出现的地方。

耶鲁公开课 - 弥尔顿课程节选

The appearance of this semi-epic rhyme scheme here at the end of Milton's poem suggests his readiness, and he's ready only here at the end of Lycidas to embark on the epic project.

弥尔顿诗篇的最后处半史诗韵律的设计,显示了他已准备就绪，他在的结尾处依然准备好了,在史诗的创作上留下自己的印迹。

耶鲁公开课 - 弥尔顿课程节选

But any state pledge was granted in secret, out of shame at the appearance of intervention.

ECONOMIST: Hong Kong's economy

While some may have grumbled at the appearance of favorable treatment with the delay, there is a rationale behind it.

FORBES: Rapper Ja Rule Sentenced in Tax Case

"I was pretty shocked at the appearance of the Galaxy S phone and the extent it appeared to copy Apple products, " he told the jury, adding that he was even more shocked when he saw the Galaxy tab.

MSN: Apple executive: Steve Jobs was open to making a smaller iPad - Technology & science - Computers | NBC News