此外，“家庭爱心房”里的电脑扮演着不可或缺的角色，因为它为廖提供了一个宝贵的机会，可以帮助那些父母远在外地工作的孩子上网聊天。
Moreover, a computer in the "family love room" plays an indispensable role because it offers a precious opportunity for Liao to help children whose parents are working far away to chat with them online.
艺术家不断地扩大创作领域，使公共艺术在社会生活中扮演了一个更加广阔的角色，成为城市空间不可或缺的一部分。
The artists are continually expanding the creation field, making public art in social life play a more extensive role, and become an integral part of urban space.
让每一个参与者都都扮演着重要的互相联系而非不可或缺的角色。
So that each actor plays an important dependent but not indispensable role.
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