They had just sat down when a stranger appeared.

他们刚坐好，突然出现了一个陌生人。

youdao

When they had all made themselves comfortable, a stranger appeared.

当他们都已安排舒适时，一个陌生人出现了。

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After about a kilometre, a stranger appeared in front of me. "Am I going the right way?"

大约走了一公里之后，一个陌生人出现在我面前。我走对路了吗？我问他知道我要到哪里去。

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Liya is not a stranger to Forbes.com, having appeared on the Forbes list of top earning models in both 2007 and 2008.

FORBES: Model and Activist Liya Kebede On Inspiring Women Prior to the WIE Symposium

When a stranger who did wear a beard and who never once was seen hatless appeared every few months after dark to ask in broken English for a contribution toward the establishment of a Jewish national homeland in Palestine, I, who wasn't an ignorant child, didn't quite know what he was doing on our landing.

NPR: Roth Rewrites History with a 'Plot Against America'