A kind of exam that spends to embroider line degree of tightness: The embroider line that uses avery kind of to be able to use color on embroider machine will seam embroider an a inch uppercase I.
2
然后缓慢顺墙滑身而下，而腰部向前落——就像是松紧线牵动的木偶。
Then slowly slide down the wall, falling forward from the waist—like a marionette with slack strings.
3
一根确定长度、松紧和密度的弦只能发出某某音。每条线的操作是自如的。
For a string of specified length, tautness and density only certain note can be generated.
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