3.I have arranged with my classmates for an excursion to the beach.
我已经跟同学们商量好去海滩远足事。
4.He shepherded us on an excursion.
他带我们去远足。
5.In the production process of PCB, there are many defects such as surface smudginess, solder mask unevenness, text excursion, pad damage, track damage etc.