海洋上测站数平均很少， 在12小时之内，我们只能接收到四分之一的船舶站的天气预报；

The average over the oceans is sparse and only a quarter of the possible ship reports may be received within 12 hours ;

youdao

海洋上测站数平均很少， 在12小时之内，我们只能接收到四分之一的船舶站的天气预报；

The average over the oceans is sparse and only a quarter of the possible ship reports may be received within 12 hours ;

youdao