1·An unseen person makes the puppets dance.
一个看不见的人使木偶翩翩起舞。
2·People sat impatient and frightened in the dark as if an unseen enemy had landed from Mars.
人们焦急不安、惊惶失措地坐在黑暗中，好像有一名来自火星的看不见的敌人已登上了地球。
3·Such a unique view can only occur during those few seconds where the existing moonlight balances with the almost unseen first rays of sunlight.
这种独特的景象只出现在那几秒之内，在那几秒内，原有的月光和几乎看不见的第一缕阳光相平衡。
4·Then a stranger, who had been sitting unseen round the corner, came up to them.
这时，一个坐在看不见的拐角处的陌生人朝他们走来。
5·The unseen stuff is known as dark matter, and accounts for just under a quarter of the mass in the universe.
这些看不见的物质即俗称的暗物质，不过它只占据了宇宙不到四分之一的质量。