大批旅鼠开始了穿越斯堪的纳维亚平原的漫长而艰难的旅程，这段旅程可能持续数周。
Great numbers of the lemmings begin a long and hard journey across the Scandinavian plains, a journey that may last weeks.
几分钟后我开始往回爬，但是旅程比相反方向更艰难。
After a few minutes I started to climb back down. But the trip was much harder in reverse.
1990年夏天，我不顾别人劝阻，硬着头皮接受了导师的资助，从此开始了艰难的求学旅程。
In the summer of 1990, ignoring the dissuasions from others, I accepted my supervisor's sponsorship and embarked on my difficult journey of academic pursuit.
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