很想你 » Very miss you 转笔刀 » Pencil knife 8点左右吃完饭妈妈会检查弟弟的作业 » Around 8 o'clock after dinner my mother checks the brother's job ..
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Here is a knife to sharpen your pencil, my dear boy.
孩子,这儿有把小刀可以削你的铅笔。
So the knife is now in this pencil, but now I have to get that center of mass under under the pencil.
现在刀在铅笔里面,但我必须要把,重心移到,铅笔下面。
If I take a pencil and I take my pocket knife... So here is a pencil.
拿一支铅笔,这是我的小折刀。,这是铅笔。
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