The next morning jail officials assigned to guard him failed to show up for work.
第二天早上负责看守他的人员也不见了。
This trial failed to show a clinical benefit, but had several limitations.
这项临床试验存在一定的局限性，没有能够证明其临床获益。
This trial failed to show a clinical benefit, but had several limitations.
这项临床试验存在一定的局限性，没有能够证明其临床获益。
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