Sow the seeds in drills about 1/2in. deep and 12in. apart.在深约0.5英寸，间隔12英寸的条播沟里播种。The racket of drills and electric saws went on past midnight.钻孔机和电锯的噪声过了半夜还继续响着。We replaced hand picks with pneumatic picks and electric dr...
Objective To study the immunity duration of attenuated live rubella vaccine.目的了解冻干风疹减毒活疫苗的免疫持久性....round arches and attenuated columns.圆拱门和细长石柱Objective : To analyze the efficiency of delivery for CD 8 + T cell epitope b...
战时的海军中很少有势利眼，阶级意识也不强。There was very little snobbery or class-consciousness in the wartime navy.阶级和种族隔阂的消除the dissolution of barriers of class and race许多因素都很重要，如阶级、性别、年龄及民族。Many factors are important, for example class, g...
小鼠中的H -2 同种抗原是最强的组织相容性抗原.In mice the H - 2 isoantigens are the strongest histocompatibility antigens.室相容性和喷注器耐久性包括对燃烧环境的控制.Chamber compatibility and injector durability involve the control of the combustion environment.放...