Topometer
地形測斜儀
??? 情景例句
I did.
看到了。
Do you often do composition after school?
你常常在放學(xué)后做作文嗎？
The American president who fought for the freedom of slaves in the USA.
為美國奴隸的自由而戰(zhàn)的美國總統(tǒng)。