Objective To study the relation between ECG character and treatment of ventricular extrasystole.目的研究室早的心电图表现与治疗的关系.Changes and Clinical Significance of ECG of Ventricular Extrasystole ( Analysis of 70 Cases )室性早搏的心电图变化及临...
Suddenly a bolt of lightning crackled through the sky.突然一道闪电划破长空。If the soil dries out the plants may bolt.如果土壤过干，植株可能会过早结实。Loosen the bolt so the bars can be turned.松一松插销，好转动门闩。...
In each case the hijackers bluffed the crew using fake grenades...每一个案例中，劫机者都用了假手榴弹吓唬机组人员。He threw his last four grenades.他投出了最后四颗手榴弹。The hijackers were armed with hand grenades.劫机者身上带着手榴弹。In the latest incident at the w...