第四章田径。
In this paper, the automatic level control system for four track concrete paver is researched.
本文对四履带滑模式水泥混凝土摊铺机自动找平控制系统进行了研究。
There was a similar accident on the same stretch of track four years ago.
四年前在同一段铁轨上也发生过类似的事故。
She ran four circuits of the track.
她在跑道上跑了四圈。
So she signed up for four different track events.
就这样，她一口气报了四个径赛项目。
The former Auxerre player will now spend four weeks with the track and field trainer.
前欧塞尔球员现在将花四周时间与这名田径教练一起。
Every four years a leap day helped keep things on track.
四年一闰，闰年于二月底增加一闰日以保证万物步入正轨。
Every four years a leap day helped keep things on track.
四年一闰，闰年于二月底增加一闰日以保证万物步入正轨。
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