let down: 不支持,使失望穿云下降飞行放低;使失望;松劲放下(窗帘),失望放下,降低放下,降低;使失望放下去辜负,使失望,失信,;放下来加长降低,使…失望开(枪),放(炮、烟火等)州)放开弓后还原排列整齐让….失望使(人)失望;放下;放(长)使…失望,使人垂头丧气使失望,不支持使失望,放下,降低
Be let in on the ground floor 投资人以享有与企业发起人同样优先权的资格入股
2.
If they have come along here ten or fifteen years ago they might have been let in on the ground floor of a lot of things 假如他们在十年或十五年以前来到这我儿的话,他们就可以在许多生意上获得与创办人同等的利益了。