在这里，根除燕八哥的活动已经进行了一段时间，目的是研究它们对黑头绿鹃和金颊莺之类濒危鸟类的寄生影响。
The eradication of cowbirds has been going on for a while here in an effort to study the effect of their parasitism on endangered birds such as the black-capped vireo and the golden-cheeked warbler.
第一阶段，燕文化的起源与形成阶段，包含燕文化的第一至三期，年代相当于西周时期。
The first stage, Yan origin and formation stage of culture, including the first three phases Yan culture, age is equivalent to the Western Zhou Dynasty.
第四阶段，燕文化的持续扩张，包括燕文化的第九期，年代相当于战国晚期。
The fourth stage, Yan culture decline phase, including the Ninth Yan culture, age is equivalent to the late Warring States period.
晓燕，那一段时光，我等你等得好苦好累。
Xiaoyan, I waited for you so hard and so tired during that period of time.
燕卜荪模式，是指在文学批评中，以文本中一个字或一两段句子为批评对象，用来证明批评者提出的某一个理论观点的合理性。
The mode of Empson in the literary criticism refers to the mode of choosing one word or sentence as the critical object to prove the rationality of a certain theoretic idea put forward by a critic.
园林寂寞无客燕，一段春是杜鹃。
第三阶段是从乾隆四十一年北游幽燕至乾隆四十八年客死运城。
The third stage was from the 41st year of Qianlong when he travelled around the north to the 48th year of Qianlong when he die Yuncheng.
第三阶段是从乾隆四十一年北游幽燕至乾隆四十八年客死运城。
The third stage was from the 41st year of Qianlong when he travelled around the north to the 48th year of Qianlong when he die Yuncheng.
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