The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.
这一幕，正是秘鲁过去十年政治现实的缩影：在总统频繁更替、权力博弈不断的背景下，政策与人事反复摇摆，制度预期愈发不稳。
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Plant-based syrup, such as glucose syrup derived from sugar cane, can be half the price of genuine honey, or even less.