Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
capsule – n. a very small container that is filled with medicine and swallowed whole
acidic – adj. of or related to the qualities of an acid
parasite – adj. of or related to an animal or plant that lives in or on another animal or plant and gets food or protection from it
transiently – adv. not lasting long
region – n. a part of a country, of the world, etc., that is different or separate from other parts in some way
gradually – adv. moving or changing in small amounts; happening in a slow way over a long period of time
dissolve – v. to mix with a liquid and become part of the liquid
