system_notification: "系统通知邮件"
field_time: 根据最后登录时间选择用户
field_body: 正文
field_users: 用户
button_send: 发送
text_24_hours: "24小时"
text_1_week: "1周"
text_1_month: "1个月"
text_this_year: "今年"
text_all_time: "全部"

