Fill ice cube trays with lemon juice. Once frozen, store the cubes in a plastic resealable bag. This way you always have fresh lemon juice on hand.

在制冰盒中装满柠檬汁。冷冻后，把冰块储放在可再次密封的塑料袋中。这样你在手边随时都有新鲜的柠檬汁。

The emergency services were on hand with medical advice.

随时都有急诊服务，并提供医疗咨询。

There are experts on hand to give you all the help and advice you need.

有现成的专家随时为你提供所需的一切帮助和建议。

Give away any food you have on hand, or lock it up and give the key to the neighbours.

把你手头的食物分发送人，或锁藏起来，把钥匙交给邻居们。

None of this is likely to be on hand if you cannot even afford to mend the dismally few highways you have.

如果你甚至不能承担惨淡的几条高速公路的维修，那么这些都不太可能发生。