If the needle floats on top of the water instead of sinking, it proves the girl is a skilled embroiders.
如果针浮在水面而不是下沉，这就证明该女孩是一个熟练的刺绣者。
2
In this day, girls will throw a sewing needle into a bowl full of water on the night of Qixi as a test of embroidery skills.
在这一天，女孩子们会在七夕晚上向一个载满水的碗里投一枚针，作为刺绣能力的测试。
3
Additional cleaning techniques can include using a needle-less plastic syringe to vigorously wash the tooth with moderately pressured water or to softly wash it with hydrogen peroxide.