superficial lymphatic vessel

例句：

1. 1. The superficial layer of the skin is very thin and easily damaged.
   皮肤表面的那层非常薄，很容易受损。
2. 2.The researcher found that superficial changes in the environment could have significant impacts on wildlife.
   研究人员发现，环境表面的微小变化对野生动物有重大影响。
3. 3.The company's superficial advertising campaigns did not attract long-term customers.
   公司的肤浅广告活动并没有吸引到长期客户。