英语语法分析

Wild parakeets could be culled before their population runs' out of control.

野生长尾小鹦鹉在数量超出控制前可能被捕杀。

The flock of parakeets undoubtedly began as pets who escaped from their owners, Bird said.

伯德说，无庸置疑，这群鹦鹉原本是从主人那里逃出来的宠物鸟。

Only if these measures are unsuccessful or not appropriate will a culling of some Monk Parakeets be considered.

只有当这些办法不成功或者不合适才会考虑捕杀一些和尚鹦鹉。