She was forced to live in a cockroach-infested house.她被迫住在一间蟑螂成群的房子里。She was forced to live in a cockroach - infested house.她被迫住在一间蟑螂成群的房子里.A species of cockroach sprays a substance , ethylacrolein, that is a kind of tea...
She was forced to live in a cockroach - infested house.她被迫住在一间蟑螂成群的房子里.A species of cockroach sprays a substance , ethylacrolein, that is a kind of tear gas.某种蟑螂喷射一种催泪性毒气――乙 基丙烯 醛.You must be tough as a cockroach to surv...
在花粉形成过程中,花药内天然产生一种化合物.During pollen formation a compound is produced naturally in the anther.将花药筛到无光的 、 具渗透性的纸上, 如报纸或卫生纸, 以便花药干燥.Sift the anthers onto unglazed, permeable paper, such as newspaper or paper toweling, for d...