“yegane” in English

There isn't a single cloud in the sky.

I can only wonder if this is the same for everyone else.

This is a plant unique to this country.

That's my sole concern.

In case the shipment is delayed, we have special delay insurance.

In English, we should use the pronouns "a" or "an" before singular nouns like "house", "dog", "radio", "computer", etc.