Lanz's line

例句：

1. 1. The artist drew a line across the paper to indicate where the painting should start.
   这位艺术家在纸上画了一条线，以指示画作应该从哪里开始。
2. 2. The scientist used a laser to trace the path of the molecule.
   科学家使用激光来追踪分子的路径。
3. 3. The company has established a new line of products aimed at environmentally conscious consumers.
   该公司已经建立了一个新的产品线，旨在满足环保意识强的消费者的需求。