To reconstitute dried tomatoes, simmer in plain water until they are tender.

给干西红柿加水使其复原，放在清水里炖直到它们变嫩。

Then he reverted to using plain water.

然后他又恢复使用平常的水。

First boil in plain water for 20 seconds.

首先在白开水里煮20秒。

Both were offered plain water or water with sucrose.

给他们都喂两样东西：白水和蔗糖水。

Plain water is fine for staying hydrated during the week.

一周之中白开水可以很好保持水化的。