Rather than wait for the other thread to finish, the current thread can "help" it out by finishing the operation for it by moving the tail pointer forward (b).
不必等候其他线程完成，当前线程就可以“帮助”它完成操作，把尾指针向前移动(B)。
Break yarn, leaving a long tail. Stuff arms. Using black thread and blanket stitch, work fingers. Sew hole to close. Attach arms to body.
预留余线并剪断线，使用黑色绣线绣出手指的效果。填充棉花并将手臂接缝在身体上。
Can be arbitrarily high fixed-line length, lint, thread tail and Strip length.
可任意高定线长，线头，线尾及剥线长度。
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