I greased front and rear hubs and adjusted the brakes.

　　我在前后輪轂上都抹了潤滑油，還調(diào)校了剎車。

　　He was already buffing the car's hubs.

　　他已經(jīng)在擦汽車輪轂了。

　　London was on the rise, starting to replace Amsterdam as the hub of world trade.

　　倫敦正在崛起，開始取代阿姆斯特丹成為世界貿(mào)易的中心。

　　It is much as spokes of wheels around hubs formed by Spanish peaks and dike mountain.

　　它看上去十分像圍繞由兩班牙峰和巖脈山所構成的輪轂的輪輻。

　　This city, situated at the transportation hub between North and south, is a distribution centre for all kinds of important goods and materials.

　　該市位居南北交通樞紐，為各種重要物資的集散地。