菲涅尔镜片又称螺纹透镜，镜面上刻录了大小不一的螺纹。上一代主流会采用菲涅尔镜片因为这样透镜更薄更轻，厚度很薄，通常只有几毫米，重量也大大减轻。使用螺纹镜片会有一定的牺牲，因为螺纹会影响曲率和光线聚焦。 ├─────────┼──────────────────────────────────────────┼─────────────────────────┤ cost of others equally applicable to sentencing; or When the sentence imposed is startlingly inappropriat... https://coingenius.news/train-a-large-language-model-on-a-single-amazon-sagemaker-gpu-with-hugging-face-and-lora-amazon-web-services/