A sure sign of denial明示的拒绝
a sign of rain下雨的预兆
A sign of success走向成功的标志
a sign of friendship友谊的象征
show a sign of显示出…迹象
a sign of peace和平的标志
a sign of erasure涂改痕迹
A sign of Recovery反弹小调
A sign of faith信任