spacing of joints

例句：

1. 1. Thedoctor advised him to take a break fromhis work and rest for a while.
   医生建议他休息一下，放松一下。
2. 2. Thecarpenter carefully measured the distance betweenthe two pieces of wood before joining themtogether.
   木匠仔细测量了两块木头之间的距离，然后把它们连接在一起。
3. 3. Thescientist observed the distribution ofcells in the tissue and notedthe spacing between them.
   科学家观察了组织中的细胞分布，并注意到它们之间的间距。