单词	trial ramming
释义	trial ramming 试夯
随便看	retention qualitative method retention quota retention quota of export earnings retention range retention range variation synchronisation retention rate retention rate of original words retention rate of proteins retention ratio retention recall retention requirement retention requiring purgtion retention reservoir Retention rule retentions Retention sausage retention screen retention screw retention sign retention signal RetentionsPsychology retention stage retention standards retention storage retention strategy