【词组解析】
1. on hand 在场,在手边
（1）Mr. Blake's secretary is always on hand when he appears in public.
布雷先生在公开场合露面时，他的秘书总在场。
（2）Cash on hand tallies with the figure in the accounts.
现款跟账上的数目没有出入。
2. on loan to 借给
（1）He is on loan to the Foreign Languages Press.
他借调到外文出版社工作去了。
（2）This picture is on loan from the Louvre to the National Gallery.
这幅画是由罗浮宫借给国家美术馆的。
3. on occasion 有时,间或
（1）Everyone should indulge in fantasy on occasion.
每个人都应偶尔沉浸在想像之中。
（2）You have on occasion surprised people.
你有时使人们感到诧异。
4. on one's guard 警惕,提防
（1）I should certainly be on my guard if I were you.
我要是你肯定会保持警惕。
（2）If his affection continues, I must be on my guard not to encourage it.
如果他的情感还在继续的话，我必须注意。不予鼓励。
5. on one's own 独立,独自
（1）I'd rather meet him here on my own home ground.
我宁愿在我自己的地盘上见他。
（2）I'm leaving the company to branch out on my own.
我打算脱离这家公司，自己开公司。
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