flora(植物系)とfauna(動物系)が合わさって動植物系あるいは動植物の生態系のような意味になります。117 this country has some of the most unique flora and fauna in the world 
http://www.youtube.com/watch?v=HvrJNC6r-NQ 0:08 lush with exotic flora and fauna 生態系の豊富な
http://www.youtube.com/watch?v=8FsAr4ewb6M to protect the 20,000 species of flora and fauna that live in it. そこで生息する2万種もの生態系を守るため
http://www.youtube.com/watch?v=y48Jqdglal0 2:25 flora and fauna
10;10 ... and the owner's allowed the woods and the fields and the naturally occurring flora and fauna to flourish here by leaving them alone. ここの城主は広大な所有地に手を加えず野生が繁殖するのを容認した。
Climate Change: can nature repair the planet? | The Economist
参考リンク
     http://bridge-english.blogspot.com/2018/09/brains-and-brawn.html      brains and brawn 文武、知力と腕力 
                                        
練習問題解答
                                        
a-2268     flora and fauna
                                        
a-3252    the flora and fauna
                                        
a-7180   flora and fauna
                                        
a-7703    flora and fauna
                                        
a-8577           the flora and fauna of Mauritius
                                        
b-0214      flora and fauna
                                        
b-0942       the fauna 
                                 
b-2974    fauna 
                                 
b-3388           the flora and fauna
                                
b-7960     local flora and fauna