He had had a varied training and held many offices.

　　受过多方面的训练, 担任过许多职务。

　　variouslyadv. 不同地/多方面地。

　　4、on guard：站岗，值班保持警惕提防Who was on guard when the fire broke?

　　导学P2-3

　　The soldiers were on guard around the whole palace in case terrorists attack. 士兵们围绕整个皇宫

　　off guard 疏忽(失去)警惕，不提防nder guard 处于看管下

　　be on guard against (doing) sth.提防着… Everyone must be on guard against thieves. 大家要提防小偷。

　　He is always on his guard against saying wrong words.他一直保持警惕不要说错话。keep /stand guard over站岗/放哨，守卫看守He kept guard over the horse while we looked for water.

　　be on one’s guard 警惕，提防 Be on your guard, they alaways try to cheat tourists.小心点,总骗客人

　　guard sb/sth against sth 避免, 预防We must guard against accidents. 必须谨防事故。He guarded himself against vice. 避免染上坏习惯。

　　on＋名词，on表示处于某种状态或方位。on business（在)出差；

　　on board乘(船飞机)on call听候召唤on duty/watch值班on fire着火on foot步行on guard在岗on holiday（在)度假on leave休假on sale待售on shore在岸上on time准时on the move在进行中on the other hand另一方面on the spot当场on the tip of one's tongue快要说出口on top of在…的顶部on watch值班on purpose故意地

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