美國是全球少數積極執行強迫勞動進口禁令的國家之一。根據《1930年關稅法》第307條，美國海關暨邊境保護局可在「合理懷疑」商品涉及強迫勞動時，禁止其進口並發布暫扣令，必要時還可課以罰款或要求企業提供資訊。
A git repository is a content-addressable object store where objects go in indexed by the SHA1 of their content, plus a set of named references pointing at specific objects by hash. The on-disk format (loose objects as individual files, packfiles as delta-compressed archives with a separate index, a ref store split between a directory of files and a packed-refs flat file with a locking protocol that breaks on NFS) is an implementation detail. The protocol for synchronising objects and refs between repositories is what actually matters, and since git-the-program is just one implementation of it, you can swap the storage backend without clients noticing.，更多细节参见91视频
candidate.weight = 1.0 / distance to candidate。Line官方版本下载是该领域的重要参考
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