Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
bottom line – expression conclusion; final decision
key – adj. extremely important
fragile – adj. not strong
deterioration – n. the act or process of becoming worse
core – v. describing the most important or basic part of something
adjustment – n. a change, often small, that improves something or makes it work better
ramp up – expression to increase the size or amount of something; to increase the volume, amount, or rate of something
presence – n. the fact of being in a particular place
We want to hear from you. Write to us in the comments section.
