VOA慢速英语:American History: Stock Crash of 1929

1.Time and again, people heard how rich they could become if they found and bought stocks for companies growing into industrial giants.

time and again无数次, 屡次, 一再

例句：I read the poem time and again.
      我一遍又一遍地读这首诗。
 
2.Everybody ought to be rich.

ought to应当,应该

例句：She ought to slim.
      她应该减肥。

ought to和should的区别

(1)一般说来，两者可替换，只是ought to语气稍重。如：

You ought to [should] go and see Mary sometime. 你应该什么时候去看看玛丽。

The train ought to [should] have arrived at six. 火车本应该6点钟到的。　

(2)表示出于法令规则、行为准则、道德责任等客观情况而“应该”做某事时，一般应用ought to，若用should则含有个人意见，强调主观看法。如：

(We ought to go and see Mary tomorrow, but I don’t think we will. 明天我们按理应该去看看玛丽，但是我认为我们不会去(此句不宜用should)。

(3)在公告、须知或条例中，出于礼貌，常用should。如：
You should not run alongside the swimming-pool. 不准在游泳池边奔跑。

3.Some experts pointed to danger signs in the economy during the summer of nineteen twenty-nine.

point to表明

例句：All the signs at the moment point to an early resumption of the fighting between the two countries.
      眼下的一切迹象都表明这两个国家将很快重新开战。