sure sign的用法和樣例：
例句
- In Hubble Space Telescope images, many ancient galaxies have disturbed morphologies, a telltale sign of interaction.
哈伯太空望遠鏡的影像顯示，很多遠古的星系有受擾動過的形態，這是交互作用的證據。 - The evidence so far is that there has been little sign of contagion from the housing market to declining household consumption or business investment.
迄今為止的證據是，沒有跡象表明，住宅市場的狀況已導致家庭消費或企業投資不斷下降。
