adduction of thumb

例句：

1. 1. The scientist used a microscope to observe the tiny particles in the sample.
   科学家使用显微镜观察样本中的微小颗粒。
2. 2.The artist applied paint with a brush to create a beautiful landscape painting.
   艺术家用刷子涂颜料创作一幅美丽的风景画。
3. 3.The carpenter carefully fitted the wooden planks together to make a sturdy door.
   木匠仔细地把木板拼接起来制作一扇结实的门。