Think about the word and use it, in your mind, in a sentence.
想想这个字,然后去用它,在脑子里,在句子里。
The ancient Roman civilization was finally destroyed by the nomadic tribles.
古罗马终于被游牧民族灭亡了。
Then, her composure regained, she was ready to set off with the porter's assistance to search for nay intruders who might still be lurking in her flat.