7、Once before, the phenomenon of "greenhouse flowers" became a hot point under discussion.

【译文】“温室花朵”现象曾经成为人们谈论的焦点。

【分析】本句适合剖析社会热点问题，可用作段落首句，直入话题，然后进行针对性的评论。类似的表达还有… has been brought into focus/aroused public attention/ become a heated topic/been in the limelight 等。

8、Admittedly, excessive love carries much potential harm.

【译文】无可否认，溺爱带来许多潜在的危害。

【分析】本句型常用于分析利弊的文章中，可以用此引出对反对的观点的剖析。Admittedly意思是“无可否认，诚然”，其同义表达还有Confessedly， No doubt， There is no denying that 等。