其中封闭内测（closed alpha）阶段是不能报名参加的，暴雪邀请极少数不同类型的玩家参与，参加者必须签署严格的保密协议。
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closed alpha
封闭的α
以上为机器翻译结果，长、整句建议使用 人工翻译 。
What's even more shocking about these Numbers is that the app is still in closed alpha.
比这些数字更让人震惊的是这款应用目前还在封闭alpha测试中。
youdao
The Closed Beta has started and the NDA has been lifted on us Alpha Tester folks.
封测已经开始，然后NDA(保密协定)也不会再限制我们了。
In an email today, Carl Manneh told me that Scrolls should be ready for a closed alpha within 1-2 months.
FORBES: Move up http://i.forbesimg.com t Move down
Writing on the Scroll website Jakob Porser, lead developer on the game, said Mojang was getting close to running a "closed Alpha" test.
BBC: Minecraft makers show off Scrolls project
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