the experience gave him a different perspective on life
optimum adj. 最优的，最佳
optimism n.乐观，
passionate passionate adj.热情的，
although the weather today was cold and blustery , those workes still had their job done.
mediocre 平庸的，普通的
mediocre
geologist have made a major breakthrough recently.
withdraw 撤回，拿走
exact diagnosis 准确的诊断
gamble gamble v.冒风险，n.赌博
he doesn' t drink or gamble any more.
vapor n.烟雾，水蒸气
vague adj.模糊的，不确定的
carpenter 木匠
apprentice, chill ,
the truck can transporter a bulk of goods.
tangle 一团糟
can you discrible him to me?
the insurance salesman persuaded me to buy healthy cover.
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