他是那样的专注和细致，锲而不舍，他的技术已经超过专业技师了，他磨出的复合镜片的放大倍数，比他们的都要高。
He was so concentrated on it and careful, persevering, and his technology had been better than professional technician, and his grind compound lens magnification, should be higher than theirs.
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