To select the right level of abstraction is a key service modeling issue.
选择正确的抽象级别是服务建模的一个关键问题。
Select a movie that matches your current English level .
选择一个符合你英语水平的电影。
Select a movie that matches your current English level.
选择一个符合你英语水平的电影。
Select a location accessible to water lines and power supply where the floor is level.
选择靠近水管和电源的水平地面放置热水器。
Select the difficulty level, pick up your guns, do a quick video gunman.
选择难度级别，拿起你的枪，去做个电玩快枪手。
Select the difficulty level, pick up your guns, do a quick video gunman.
选择难度级别，拿起你的枪，去做个电玩快枪手。
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