We know what is causing the decline in Numbers of wild tigers: illegal poaching; illegal wildlife trade; loss of habitat through conversion, encroachment, and land degradation.

我们知道是什么原因导致了野生老虎数量的下降，这些原因就是：非法偷猎；非法野生动植物贸易；变更用途、侵占和土地退化导致的栖息地丧失。

youdao

Any activity by the Philippine side on China's territory it has occupied is illegal and cannot cover up the illegal nature of its encroachment.

菲方在侵占的中国领土上开展任何活动都是非法的，都无法掩盖其侵占行为的非法性。

youdao