The lowering clouds presage a storm . 暗云低沉是暴风雨的前兆。
Black clouds portend a storm . 乌云为暴风雨的前兆。
Crazing is the invariable precursor of brittle fracture . 出现小裂纹必然是脆性断裂的前兆。
It signals a warning of potential unemployment or of a recession . 这标志了潜在失业或衰退的前兆。
In the moribund patient deepening coma are the usual preludes to death . 病人弥留之际,加深的昏睡通常是死的前兆。
One was put in mind of a brilliant, slightly stifling summer day whose beauty is the harbinger of a distant thunderstorm . 这种情况令人感觉是一个阳光灿烂而又有点气闷的夏天,明媚的风光是一场遥远的雷阵雨的前兆。
Others simply see it as evidence of a bubble 但是也有人认为这是资本泡沫的前兆。
A sign of a future happening ; a portent 前兆表明将来要发生的事情的现象;预兆
[ c ] such a slowdown usually precedes a boom 这样的经济下滑通常是高涨的前兆。
Black clouds are an unmistakable sign of coming rain 乌云是下雨的明显前兆。