trough in westlies

• 西风槽

trough in westlies的用法和样例：

例句

1. A trough has weakened the ridge north of NANGKA and a weakness has been created.
   一道西风槽令浪卡北面的副热带高压脊减弱，并构成弱点。
2. The ridge is expected to be eroded by a mid-latitude trough so as to induce a recurvature.
   预料一道西风槽的到来将会令该副高减弱，茉莉将得以转向。