It 's surely not all harps and angels and clouds like you might see in a movie .

它当然不会像你在电影里看到的那样满是竖琴，天使和白云。

By that time - it was the bronze age - humans were already casting metal alloys , constructing canals and sailboats , and even designing complex musical instruments such as harps .

那个时代已经是青铜器时代人类已经会锻造金属合金，开凿运河，制造帆船，甚至设计出复杂的乐器，例如竖琴。