getOrInsertComputed works similarly, but is for cases where the default value may be expensive to compute (e.g. requires lots of computations, allocations, or does long-running synchronous I/O).
"My mother was completely isolated, and the impact of her grief has been profound, complex and far-reaching."
，更多细节参见PDF资料
СюжетПовреждение нефтепровода «Дружба»
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为了验证新电池的低温抗性，测试车被开进了哈尔滨零下二十多度的室外，以及零下 30 度的极端低温实验室。