within arm's reach是什么意思

within arm's reach
伸手可及的;

例句:

1.
You'd better keep your baby within arm's reach.
你最好把小孩放在伸手可及的地方。

2.
I propped up my weapon within arm's reach, sat down, and had an amiableconversation with the good professor while the barber worked his trade.
我把武器放在手能伸到的地方，坐下来，理发师开始帮我剪头发，期间我和那位不错的教授进行了一场亲切友好的对话。