Like a theater audience that watches the herky-jerky gestures of a marionette and infers the presence of a hidden puppeteer, researchers observe that visible matter moves in unaccountable ways and conclude that unseen matter must be pulling the strings.

• 这就好像观众在戏院中看到木偶的一举手、一投足，便会推论出幕后有人在操纵著；当天文学家观察到有形可见的物质以不能理解的方式运动时，即认定背后有看不见的物质在作怪。