Though there may be internal strife or disagreements within a family or group, they will unite against external threats or common adversaries. (Literally: brothers quarrel within the wall, but unite against outsiders)
尽管项目团队内部有时会有意见不合，但面对外部竞争时，大家总是兄弟阋于墙，共同努力争取成功。
Although there are sometimes disagreements within the project team, when facing external competition, everyone always acts like brothers quarreling within the wall, uniting to strive for success.
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