必须保持 meaning in English
mandatory retention
Examples
- A laboratory must be kept in good order .
实验室里必须保持井井有条。 - Mr. elton must compose his joyous looks .
厄尔吞先生必须保持他欢乐的神色。 - The town where she lived had to be kept clean and sweet .
她住的镇上必须保持清洁、芳香。 - Ventilation must be ensured .
必须保持通风。 - "you must compose yourself," said the doctor, supporting her .
“你必须保持镇静，”大夫扶着他说。