It just so happened that while she was sipping some tea, one of the cocoons that she had collected landed in the hot tea and started to unravel into a finethread.
事情是这样的，当她喝着茶的时候，她收集的一个蚕茧落在热茶里，然后蚕茧开始散开，变成了一根细线。
2
He tied off both ends of the oxbow with fine black thread, snipped them, and pushed them back under the skin.
他用细黑线系住U形两端，再剪断它们，把它们放回到皮肤下面。
3
Her skillful fingers spun the wool out to a finethread.