13. We would like to make advance arrangements for client conferences.
我們希望事先安排與客戶洽談相關事宜。
還能這樣說：
We want to make an arrangement for the client conference in advance.
We are desirous of arranging for the client conference ahead of time.
應用解析：
advance in sth. 在某方面改進；
advanced level 高級水平；
advance sth. to sb. 向某人預付（錢），借（錢）；
advance towards sth. 向著某物前進

14. We should phase in the new working plans.
我們應逐步采用這個新的工作計劃。
還能這樣說：
We should put this new working plan into practice step by step.
We ought to adopt the new working plan gradually.
應用解析：
phase in 逐步采用，逐步引入；
phase out 逐步停止采用，逐步退出；
phase sth. out 逐步或分階段撤出或淘汰

15. We must make our company known to more and more people in the world.
我們必須讓公司為世界上越來越多的人了解。
還能這樣說：
We must make our company popular in the whole world.
We spare our efforts to make our company known by more and more people.
應用解析：
world without end 永遠；
be all the world to sb. 對某人來說非常寶貴或非常重要；
go up in the world 發跡，變富；
dead to the world 熟睡；
for all the world 無論如何