and repeated fields
重复字段
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Protocol buffers supports optional, required and repeated fields. An example of an address book message definition using protocol buffers would look like this.
Protocol buffers支持可选的，必需的和重复的字段。
youdao
应用推荐
模块上移
模块下移
不移动