These are the paths of Voyager 1, Voyager 2, Pioneer 11 and Pioneer 10, the first four spacecraft to have left the solar system.
这些是星际旅行者1号2号，以及先锋11和10号的轨迹，第一次四个航天器离开了太阳系。
Next most distant, Pioneer 10 is about 15.4 billion kilometers from the Sun, though on the opposite side of the solar system from Voyager 1.
第二遥远的是先驱者10号，距离太阳约有154亿千米，不过它和航行者1号是向着太阳系的两个方向飞行的。
Pioneer and successional plant communities are said to change over periods from 1 to 500 years.
先驱者和演替植物群落据说是以1-500年的时间区间变化的。
Scientists who pioneer research into why woodpeckers(1) do not get headaches and whether dung beetles(2) like their diet have at last been recognized for their work.
研究啄木鸟为什么不头痛和金龟子是否喜欢吃大粪的科学家们终于得到了肯定。
I became a Young Pioneer at Grade 1, and a National team player at Grade 2. Each Monday, I raise the national flag in front of all students, I'm proud of myself.
我在一年级就光荣地加入了中国少年先锋队，二年级成为了学校的国旗队队员，每周一都要在全校学生队伍前面升国旗，我非常地高兴和自豪！
I became a Young Pioneer at Grade 1, and a National team player at Grade 2. Each Monday, I raise the national flag in front of all students, I'm proud of myself.
我在一年级就光荣地加入了中国少年先锋队，二年级成为了学校的国旗队队员，每周一都要在全校学生队伍前面升国旗，我非常地高兴和自豪！
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