This new drug’s potency is not yet known.
convincing adj. 令人信服的，肯定的
The end of the book wasn’t very convincing.
indigenous adj. 原住民的
So who are the indigenous people of this land?
incipient adj. 初期的
Signs of incipient public frustration
The dog has been her constant companion this past then years.
jungle n. 叢林
Either side of the river is a dense, impenetrable jungle.
She made several insults about my appearance.
Draw a pair of parallel lines.