obstruct的一般过去时为：obstructed...

The boy was suffering from a bowel obstruction and he died.这个男孩因患肠梗阻死去了。the obstruction of justice妨碍司法公正The asylum seekers had to contend with continued bureaucratic obstruction.寻求政治庇护的人得不断地应付官僚主义的层层阻挠....

Title : Can Patients Receiving Aminophylline for Asthma and Chronic Obstructive Pulmonary Disease QuIt'smoking?哮喘及慢性阻塞性肺病患者用茶碱类药物时能戒烟 吗 ?Chronic obstructive pulmonary disease; Respiratory failure; Enteral nutrition;...

obstructing的音标：...

vt.阻塞，堵塞，阻碍，阻止vi.阻塞，妨碍，（给…）设置障碍...

Lay them on their side and ensure the airway is unobstructed.让他们侧躺着,并确保呼吸道畅通.Pressure and flow pulses may be used to keep the tubes unobstructed.可用压力和流动脉冲使管子畅通.The motorist enjoys an unobstructed view of the natural scen...

obstructions的音标：obstructions的英式发音音标为：[əbst'rʌkʃnz]obstructions的美式发音音标为：[əbst'rʌkʃnz]...

Many women feel ageism is obstructing their career ambitions.许多女性感到年龄歧视问题正阻碍着她们职业抱负的实现。You can't park here, you're obstructing my driveway.你不能在这里停车，你挡住了我家的车道。Drivers who park their cars illegally, particularly ...