Professor Wright also making preparations for the talks,because if the absence of Professor Smith,he can be on top in case.
英语翻译怀特教授也要为这个讲座做准备,因为万一史密斯教授缺席,他就可以顶上.（in case）
Professor Wright also making preparations for the talks,because if the absence of Professor Smith,he can be on top in case.