种界，读音为zhǒng jiè，是一个汉语词语，意思是种族的界限。
自然界有40种蚊子可以传播疟疾，通过对其中一种(Anopheles gambiae，冈比亚疟蚊)进行研究，研究人员们创造了100只雄性不育蚊子。
By studying one (Anopheles gambiae) of the 40 mosquito species that spread the disease in nature, researchers created 100 male mosquitoes without sperm.
1960年代，学术界和批评界的关注使电影作为一种真正的艺术形式荣登大雅之堂。
In the 1960s academic and critical attention to cinema as a legitimate art form emerged.
人同自然界其他事物之间最重要的区别之一就是，人懂得短暂、始与终，所以也了解时间是一种恩赐。
One of the most important characteristics distinguishing man from all other forms of nature is his knowledge of transitoriness, of beginning and end, and therefore of the gift of time.
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