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樱花烂漫 三月天
李世春 2024-3-29 12:07
个人分类: 2024-魔方和自然|245 次阅读|没有评论
春假(spring break)
李世春 2024-3-17 12:14
爷爷跟着孙女走,孙女 P reschool 放假( spring break ),出来和爷爷观鸟,一棵树上有两只鸟:歌麻雀和蜂鸟 蜂鸟飞了一下,又回到树上
个人分类: 2024-魔方和自然|715 次阅读|没有评论
Megaminx = Ih Point Group: (25): ED[2]
李世春 2024-3-15 12:10
ED indicates a C2 operation, with the connecting line of the center of Megaminx to ED as the axis, rotating 180° counterclockwise. This is the definition in the textbook. In this video, ED can rotate the triangle on the face W to the face M, while the other cubies are unchanged. At the sa ...
个人分类: 2024-魔方和自然|357 次阅读|没有评论
Megaminx = Ih Point Group: (24): CD[2]
李世春 2024-3-11 12:57
CD indicates a C2 operation, with the connecting line of the center of Megaminx to CD as the axis, rotating 180° counterclockwise. This is the definition in the textbook. In this video, CD can rotate the triangle on the face W to the face H, while the other cubies are unchanged. At the sa ...
个人分类: 2024-魔方和自然|410 次阅读|没有评论
Megaminx = Ih Point Group: (23): BC[2]
李世春 2024-3-9 14:06
BC indicates a C2 operation, with the connecting line of the center of Megaminx to BC as the axis, rotating 180° counterclockwise. This is the definition in the textbook. In this video, BC can rotate the triangle on the face W to the face G, while the other cubies are unchanged. At the sa ...
个人分类: 2024-魔方和自然|432 次阅读|没有评论
Megaminx = Ih Point Group: (22): AB[2]
李世春 2024-3-7 13:15
AB indicates a C2 operation, with the connecting line of the center of Megaminx to AB as the axis, rotating 180° counterclockwise. This is the definition in the textbook. In this video, AB can rotate the triangle on the face W to the face F, while the other cubies are unchanged. At the sa ...
个人分类: 2024-魔方和自然|443 次阅读|没有评论
我找到了 她的 男的
李世春 2024-3-4 12:24
前面的头发发红,这鸭子 属于 common merganser ,我叫她红头鸭,是女的 ; 后面的是绿头鸭,是男的,属于 mallard. 修辞总是可以用的,讲故事就要用修辞。 红头鸭在睡觉,前面的鸭子是对应绿头鸭的女的,属于 mallard 前面是红头鸭,是女的;后面的是对应的男的,她和 ...
个人分类: 2024-魔方和自然|776 次阅读|没有评论
Megaminx = Ih Point Group: (21): WE[2]
李世春 2024-3-3 11:26
WE indicates a C2 operation, with the connecting line of the center of Megaminx to WE as the axis, rotating 180° counterclockwise. This is the definition in the textbook. In this video, WE can rotate the triangle on the face W to the face E, while the other cubies are unchanged. At the sa ...
个人分类: 2024-魔方和自然|452 次阅读|没有评论
养精蓄锐,含苞待放
李世春 2024-2-26 11:14
个人分类: 2024-魔方和自然|625 次阅读|没有评论
仰看二月和俯看二月
热度 2 李世春 2024-2-24 13:46
个人分类: 2024-魔方和自然|1310 次阅读|4 个评论 热度 2

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