Limited supplies and equipment, combined with an irregular flow of patients, leave doctors at this level with few opportunities to practice complicated clinical procedures.

有限的仪器和设备加上不稳定的病人流动，使基层卫生机构的医生很少有机会进行复杂的临床操作。

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But as many of the subjects emphasised, controlling the flow of cash becomes all the more critical when income is not just low, but also unpredictable and irregular.

但是正如那些被测试者所强调的，当收入不仅仅是低，而且不稳定也不可预测时，控制现金流更为至关重要。

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The resulting scar tissue blocks the abnormal flow of electrical signals that can cause irregular heartbeats.

产生的疤痕组织会阻止导致心律不齐的异常电流信号。

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