9. An ecosystem is a community of living ________ in conjunction with the nonliving components of their environment, interacting as a system.
(A) companies
(B) institutes
(C) mortalities
(D) organisms

An ecosystem生態系統is a community 社區of living ________ in conjunction 連結with the nonliving 無生命的components of their environment, interacting互相影響 as a system.

(A) companies公司
(B) institutes機構
(C) mortalities死亡率
(D) organisms有機體

生態系統是一個由生物及其環境中的非生物組成的共同體，它們作為一個系統。

moral    ity 道德

mortal  ity 終有一死的；致命的；凡人
noun [ U ]   formal

the way that people do not live for ever
必死性，生命的有限
Her death made him more aware of his own mortality.
她的去世讓他更加意識到自己終有一死。
 
Valar Morghulis（Valar Morghulis）是高等瓦雷利亞語，意思為「凡人皆有一死」。是厄斯索斯地區的一句常用語，通常人們會以一句"Valar Dohaeris，即「凡人皆需侍奉」，作為回應。


the number of deaths within a particular society and within a particular period of time
死亡數字，死亡率
the mortality rate

死亡率
Infant mortality is much higher in the poorest areas of the city.
在這個城市最貧困的地區，嬰兒的死亡率要高得多。