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。
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)。
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。
The parabolic barrier, double barrier with a rectangular well, double barrier with a parabolic well structure and the potential barrier placed in an external field are discussed here.
利用该结果分别研究了抛物线型单势垒情况、方型双势垒情况、抛物线型双势垒情况以及置于外场中的双势垒情况。
Conclusion: the external TAT liposomes can cross the normal blood and spinal cord barrier, which shows damaged neurons targeting characteristics.
结论：外接TAT的脂质体可以穿过大鼠正常的血脊髓屏障进入脊髓内部，并且具有进入受损脊髓组织神经元的靶向特异性。
Conclusion: the external TAT liposomes can cross the normal blood and spinal cord barrier, which shows damaged neurons targeting characteristics.
结论：外接TAT的脂质体可以穿过大鼠正常的血脊髓屏障进入脊髓内部，并且具有进入受损脊髓组织神经元的靶向特异性。
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