A block has a storage capacity, and once it's used up, it can be closed and linked to a previously served block.
原因并不难解释——性价比。，这一点在whatsapp中也有详细论述
，更多细节参见谷歌
即便石头科技随后向最高人民法院申请复议并成功撤销禁令，却已然错过核心促销窗口，对销售造成实质性影响，公司方面预计相关产品销量损失约2万台。。WhatsApp Web 網頁版登入是该领域的重要参考
Note: The guard page protects against stack overflow from deep recursion in Mog code. It does not protect against stack overflow in host-provided capability functions, which run on the host’s own stack. If a capability function is itself deeply recursive, the host is responsible for its own stack safety.