..a rival male drops by, to size up the competition... 一只竞争对手来到此处 评估一下彼此的优劣

68. so it's his last chance for improvements.
    所以这是雄鸟改善装潢的最后机会
69. You can never have too many shells.
    蜗牛壳永远都不嫌多
70. But in his absence...
    但当它离开的时候
71. ..a rival male drops by, to size up the competition...
    一只竞争对手来到此处 评估一下彼此的优劣
72. ..and cause trouble.
    再搞点破坏
73. Wreck your neighbour's bower
    破坏对手的舞台
74. and your own might look better.
    就等于完善自己的舞台

来自《行星地球 第三季 第三集 Planet Earth S03E03 沙漠与草原》第 71 行