ㄟ............... 這段英文沒有講到『從太陽來的asteroids命中南半球的機率比北半球小』吧 :) Second,if an asteroids is coming from the direction of the sun, it cannot be seen because the sun is too bright. 如果小行星是從太陽的方向過來，因為太陽太亮，所以我們會看不到它 Finally,thereis no large-scale program in the southern hemispthere to try to find asteroids. 南半球沒有大型的小行星觀測計畫 "旅人" <[email protected]> 撰寫... > 這是我的英文課本的其中一段話 > Today,the governments of serveral countries try to locate > NEAs(near-Earth asteroids). Universit and amateur astronomers > also watch out for dangerous asteroids. However,there are problems. > First,most asteroids are small and dark. That makes then difficult > to spot. Second,if an asteroids is coming from the direction of > the sun,it cannot be seen because the sun is too bright. > Finally,thereis no large-scale program in the southern hemispthere > to try to find asteroids. > 中間說的又黑又小所以不好找這還理解 > 不過後來說的”從太陽來的asteroids命中南半球的機率比北半球小” > 這就不太清楚了 > 是因為南半球的面積比較少這樣而以嗎？ > 還是還包含地球傾斜的角度、形狀(橢圓形)...等 > 或者還有其他理由呢？ > 請內行解答，謝謝！