The dry spell sank the river.

干旱的天气使河水下降。

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The dry spell is over.

旱象已经解除。

《新英汉大辞典》

But even these fields are at the mercy of the dry spell.

但是即使这些田地也受干旱的支配。

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The farmers call it flying the seeds. In a dry spell, saltwater from the Gulf of Mexico can seep into Louisiana's aquifers.

VOA: standard.2010.06.17

After an extraordinary four year dry spell, the Senate has passed a formal budget proposal.

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After the phenomenal success of Apple in the 1980s, Jobs hit a dry spell.

FORBES: Innovation Is for the Young - Or Is It?

Curing cancer is a big task for a drug giant just coming off a decadelong dry spell.

FORBES: Magazine Article