大家都搜：
自由层
1、expected tier───预期层
2、highest tier───最高级别
3、tier 1───第一排
4、tier maker───层制造商
5、grand tier───花坛顶层
6、tier list───层列表
7、tier zoo───蒂尔动物园
8、top tier───顶层；高层
9、tier zero games───零层游戏
1、And with no listening cap currently for U. S. users of the free tier, I imagine that many others will find lots to like, too.───此外，由于Spotify目前对美国的免费用户未限定最大收听数量，我猜许多免费用户也会发现大量自己喜欢的内容。
2、seems to be a response, Amazon has made available a free AWS Usage Tier for new customers for one year.───似乎是作为对此的响应，Amazon为新用户提供一年的AWSMianFeiShiYong方式。
3、database tier has to process transactions in an environment as near latency-free as possible.───数据库层必须尽可能没有延迟地处理环境中的事务。
4、free tier is ad-supported and places caps on the number of hours that music can be streamed and the number of times a song can be listened to each month.───免费服务含广告，且每月可以播放音乐的时间，以及同一首歌可以收听的次数都受到限制。
5、AWS currently offers a free tier, in which the first 100, 000 messages per month are gratis.───AWS当前提供一个免费的层级，其中每个月前100,000条消息是免费的。