The difference between the bucket and barrier constructs is that in the former all processes are blocked until another (external) process decides to release them, by "flushing the bucket."

bucket 构造和 barrier 构造之间的区别是：在前者中，所有进程都被阻塞，直到另外一个（外部）进程决定释放它们，而释放是通过“清空 bucket”进行的。

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One specific barrier to wider adoption of the electric bus must be the external demand of operators for "unlimited" mileage - that is, for vehicles (i. e. diesel engines) with total flexibility.

一个具体障碍，更广泛地采用电动客车的经营者必须为“无限”里程外部需求-这是总的灵活性车辆(即柴油发动机)。

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Because oil is like a lock moisture barrier, if this layer protective film disappears, then the water will soon be air-dry the external environment.

因为油脂犹如锁住水分的一道屏障，如果这层保护膜消失不见，那么，水分很快会被外界环境风干。

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Bernstein analyst Ronny Gal suggested in a note to investors, citing weak fundamentals in the US generics space as a barrier to external interest.

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