从上述各种类型的例句中，可以学到不少撰写“材料和方法”的常用英语多种句型下面再把这些英文词组或某些常用的句子集中在一起,便于读者参考使用。

        (1)...were entered into/enrolled in/selected randomly

        (2).. were divided randomly (equally)into/classified/grouped into/randomized into...

        (3)A 50-year old patient/Patients(age 26 ± 3 years)/Patients range in age from...to... ;

        Patients more than 50 years/patients under(less)than 50 years.

        (4)Statistical analysis was performed using one way ANOVA in combination with Scheffe's test,Differences were considered significant if P<0. 05.

        (5)Tyrode's solution contained(in m mol/L) :140 NaCl,...

        (6)All chemicals were obtained/purchased from Sigma Chemical Co. ( St, Louis, MO)except for the following: Anisomycin( A.G,Scientific, Inc, , San Diego,CA)...

        (7)Ventricular myocytes were enzymatically isolated from the hearts of adult Spra-gue Dawley rats,as previously described(reference).Briefly ,...

        (8)cDNAs of...channel were subcloned into...vector

        (9)All experiments were conducted at room temperature(20~24℃).