1. Even if you travel in ideal weather, sea journeys take a long time.
    即使风平浪静，坐船旅行也要占用很长时间。

2. But investigators were not satisfied with the answer: they still did not know what agent brought plasmodium to human beings.
    但是调查者对答案并不满意：他们仍不知道是什么媒介物把疟原虫带给了人类。

3. Why don´t you entrust that to a travel agency?
    为什么你不交托给旅行社呢?

4. We couldn´t induce the old lady to travel by air.
    我们无法劝说那位老太太坐飞机去.

5. It requires 97 per cent less energy to travel the quarter of a million miles from the Moon to Earth-orbit than the 200 mile-journey from Earth´s surface into orbit!
    因此，从月球到地球的25万英里所消耗的能量要比从地球表面进入地球轨道的200英里所耗能量少97%。

6. Will you travel by sea or by air?
    你们乘船去，还是乘飞机去？

7. We may travel by sea.
    我们可能乘船去。

8. What then was the malaria-transmitting agent?
    那么，传染疟疾的中介又是什么呢？

9. When I travel to Third World countries I see many people like my father and daughter.
    我到第三世界国家去旅行时，看到了许多像我父亲和女儿那样的人。

10. They will travel in the northern cities.
    他们将在北方各城市旅行。