Temperatures averaged 15 degrees below zero and dipped as low as 31 below during his 240 - mile trek on cross - country skis 在他长达240英里跨越国界的艰难旅程中,平均气温只有零下15度,最低达到零下31度。
2.
Temperatures averaged 15 degrees below zero and dipped as low as 31 below during his 240 - mile trek on cross - country skis 在他长达240英里、跨越国界的艰难旅程中,平均气温只有零下15度,最低达到零下31度。