His first music teacher was a major influence in his life.

　　他的第一位音樂老師是他一生中對他影響非常大的人。

　　Let's be practical and work out the cost first.

　　咱們實際一點兒，先計算一下成本費用。

　　Our first task is to set up a communications system.

　　我們的首項任務(wù)是架設(shè)通信系統(tǒng)。

　　I didn't like the job much at first.

　　起初我并不很喜歡這個工作。

　　The first stage in research is data collection.

　　研究工作的第一步是收集資料。