Vocabulary
One of the different apparent shapes of the moon as seen from Earth 从地球上看，月球呈现出的不同形状之一
phase
when looking at some of the most dramatic features of the moon, a pattern of dark colored areas are low flat plains called: 观察月球上一些最引人注目的特征时，会发现一些深色区域构成的低矮平坦的平原，称为：
maria
Like the Earth, the moon _________ and __________ 就像地球一样，月球_________和__________
rotates and revolves
Phase where the moon is between the Earth and the sun 月球运行到地球和太阳之间的相位
New Moon
This is caused when an object in space comes between the sun and a third object where it casts a shadow on the third object 这是由于太空中的一个物体运行到太阳和第三个物体之间，并在第三个物体上投下阴影造成的。
eclipse
the spinning motion of a planet on its axis 行星绕其轴的自转运动
rotation
the side of the moon that always faces Earth is called: 月球始终面向地球的那一面叫做:
the near side
The moon rotates once on its ________ in the same time that it takes to revolve once around Earth 月球自转一周所需的时间与它绕地球公转一周所需的时间相同。
axis
A week after the new moon phases, the angle formed by the sun moon and Earth is about 90 degrees. The phase is half lit, half dark 新月过后一周，太阳、月球和地球之间的夹角约为90度。此时月相为半明半暗。
first quarter moon
Happens during a full moon when Earth is directly between the moon and the sun. Earth blocks sunlight from reaching the moon. 这种情况发生在满月时，此时地球正好位于月球和太阳之间。地球阻挡了阳光照射到月球上。
Lunar Eclipse
the partial or total blocking of one object in space by another 空间中一个物体被另一个物体部分或完全遮挡。
eclipse
The side of the moon that always faces away from Earth is the far side or the _______ 月球始终背对地球的那一面称为远侧或_______
dark side
A "_____" on the moon is the same length as a "_____" on the moon 月球上的“_____”与月球上的“_____”长度相同。
day, year
About halfway through the moon's revolution, you see the full sunlit side of the moon, called the: 大约在月球公转周期的中途，你会看到月球完全向阳的一面，称为：
full moon
Only people within the umbra experience this. 只有身处暗影界的人才能体验到这种感觉。
solar eclipse
the darkest part of a shadow 阴影中最黑暗的部分
umbra
If the moon did not rotate, we would see: 如果月球不自转，我们会看到：
all sides of the moon
The amount that the moon is lit by the sun 月亮被太阳照亮的程度
half
A week after the full moon, you see the sun is shining on the other half of the moon, called: 满月一周后，你会看到太阳照耀在月亮的另一半上，这被称为：
third quarter moon
Because the area of the penumbra is only partially blocked, we only see this during a solar eclipse. 由于半影区域仅部分被遮挡，因此我们只能在日食期间看到这种现象。
partial eclipse
the part of a shadow surrounding the darkest part 阴影中围绕最暗部分的部分
penumbra
True or False: Earth always sees the same side of the moon 判断题：地球总是看到月球的同一面
True
How much of the sunlit side of the moon faces the earth depends on this 月球向阳面朝向地球的面积大小取决于此。
The phase of the moon
During this phase of the moon, the moon is nearly in a line with the sun and Earth so most of the lit part of the moon is facing away from Earth 在这个月相期间，月球几乎与太阳和地球呈一条直线，因此月球大部分被照亮的部分都背对着地球。
waning crescent
Only during a new moon does this occur. When the moon passes directly between Earth and the sun, blocking the sun's light. The shadow of the moon is then cast on Earth. 只有在新月时才会发生这种情况。当月球运行到地球和太阳之间，遮挡住太阳光时，月球的影子就会投射到地球上。
solar eclipse