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"Had I not have heard [the smoke alarm], I would have just been in there," says McConnell. "They are essential, absolutely essential."，这一点在heLLoword翻译官方下载中也有详细论述
，详情可参考Line官方版本下载
Git packfiles use delta compression, storing only the diff when a 10MB file changes by one line, while the objects table stores each version in full. A file modified 100 times takes about 1GB in Postgres versus maybe 50MB in a packfile. Postgres does TOAST and compress large values, but that’s compressing individual objects in isolation, not delta-compressing across versions the way packfiles do, so the storage overhead is real. A delta-compression layer that periodically repacks objects within Postgres, or offloads large blobs to S3 the way LFS does, is a natural next step. For most repositories it still won’t matter since the median repo is small and disk is cheap, and GitHub’s Spokes system made a similar trade-off years ago, storing three full uncompressed copies of every repository across data centres because redundancy and operational simplicity beat storage efficiency even at hundreds of exabytes.
这一制度在试行过程中，也曾遭遇质疑。包括会不会出现“人情交易”“钱学交易”“权学交易”“近亲繁殖”等，影响招生的公平公正，堵死普通家庭孩子的读博之路，也影响博士生源质量、培养质量等等。但从具体的实施情况看，博生招生“申请—审核”制得到普遍认可。一方面，扩大了博导的招生自主权，有利于博导招收到适合的学生；另一方面，博士的整体生源质量并没有因试行这一制度而降低，因为与这一制度相配套，推进了博士生导师资助制（由博导承担博士生的培养经费以及生活补助），严把博士学位答辩关。博导如果招来一个缺乏学术潜能的学生，不但要承担资助费用，还要考虑其在求学期间能否发表规定的论文，能否顺利通过答辩毕业，这迫使博导认真考察申请学生的学术潜能与综合素养。与实施“申请—审核”制相对应的是，不少申请读博的学生感慨，申请太难了。，推荐阅读爱思助手下载最新版本获取更多信息
「這裡這樣的氣溫其實挺舒服的，」他說，「零下五度已經是最暖的時候。氣溫可以降到約零下40度，但平均大約是零下20度。」