这是一串钥匙This is a set of keys.
那是一串钥匙That is a set of keys。
这是一串钥匙：This is aset of keys. 那是一串钥匙：That is a set fo keys
This is a bunch of keys
That is a bunch of keys.
这是..用This is..
那是..用That is..
This is a bunch of keys.
That is a bunch of keys.
This is a string of keys. That is a string of keys.
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