physical contact

例句：

1. 1. In order to prevent the spread of disease, it's important for people to maintain a physical contact distance of at least 6 feet.
   为了预防疾病的传播，人们保持至少6英尺的物理距离是非常重要的。
2. 2. The scientist conducted an experiment to study the effect of physical contact on learning and memory.
   这位科学家进行了一项实验，研究物理接触对学习和记忆的影响。
3. 3. During the pandemic, physical contact restrictions were put in place to minimize the risk of transmission.
   在疫情期间，实施了限制物理接触的措施，以最小化传播风险。