But in the future or in the waters with very heavy traffic it is necessary to adopt corresponding measures.
但在将来或是在交通非常繁忙的水域，则有必要再采取一些相应的措施。
The traffic is not very well developed at that age, a 15-year-old boy, carrying a heavy burden at home, to the south, set out.
在那个交通不很发达的年代，一个15岁的少年，背着家里沉重的负担， 向南边，出发了。
The Dijon University Hospital in Dijon, France is involved in a large construction program with heavy truck traffic and a very dusty environment.
法国第戎大学医院参与了一个大型建筑项目，施工期间有重型卡车穿梭和产生多尘的环境。
The Dijon University Hospital in Dijon, France is involved in a large construction program with heavy truck traffic and a very dusty environment.
法国第戎大学医院参与了一个大型建筑项目，施工期间有重型卡车穿梭和产生多尘的环境。
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