For implementers, the locking model adds a fair amount of non-trivial internal bookkeeping. Every operation must check lock state, readers must be tracked, and the interplay between locks, cancellation, and error states creates a matrix of edge cases that must all be handled correctly.
时至今日，一段对话仍传递着穿透人心的力量。
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Joanne WrittleWest Midlands health correspondent
Мерц резко сменил риторику во время встречи в Китае09:25
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