English (Source)
These are the invaders which are currently attacking. The list is updated at the end of each wave, and each invader remains in the list for 5 waves. Keep an eye on what's attacking you so you can counter them accordingly.
Chinese Translation
这些是当前正在攻击的入侵者。名单在每波结束时更新，每个入侵者在名单中保留5波。注意观察正在攻击你的单位，以便相应反击。