重点讲解：
1. play a part in
在…中起作用；
eg. Culture plays a large part in non-verbal communication.
文化在非语言交流中起着很大的作用。
eg. He played a prominent part in the campaign.
他在这次运动中发挥了重要作用。
2. bring together
使联合，使团结；
eg. They're trying their best to bring together those separated families.
他们正尽最大的努力让离散的家人重聚。
eg. We should bring together the departments so that we're all singing from the same hymn sheet.
我们应该把各部门联合起来，这样我们就能意见一致了。
3. lesser-known
鲜为人知的；知名度不高；
eg. Today, they're one of the city's lesser-known tourist attractions.
时至今日，这些隧道仍然是这座城市不为人知的观光点之一。
eg. Young women are more individualistic than their mothers, and are seeking out lesser - known brands.
年青女士比她们的母亲更具个性化，开始追求一些不为众人所知的品牌。