By comparison, Spotify's free version is AD supported, restricted to desktop usage and caps the number of song plays after six months.
相比之下，Spotify的免费版是有广告赞助的，仅限于电脑使用，而且六个月后可听歌曲的数量就会受到限制。
In this springtime image, snow caps Llaima's summit, but the snow-free slopes appear in shades of purple-brown and green, likely a combination of volcanic rock and vegetation.
在这张图像中，春天的亚伊马火山顶峰的雪冠依旧明显，不过无雪的山坡开始被紫褐色和绿色覆盖，那里似乎交错分布着火山岩与植被。
The 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。
This paper presents an acoustic structure model of free—flooded cylindrical transducer installed with holed end-caps.
提出带孔盖板的自由液浸式环氧灌注的圆柱管形换能器声学结构模型。
This paper presents an acoustic structure model of free—flooded cylindrical transducer installed with holed end-caps.
提出带孔盖板的自由液浸式环氧灌注的圆柱管形换能器声学结构模型。
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