☆artificial 

synthetic, fabricated, contrived, fake, mock, bogus, counterfeit, pseudo

☆conventional 

traditional, historical, past; accepted, common, regular, routine, mainstream, ordinary

☆demand

request, claim, need, order, require, call for

☆decline 

decrease, degeneration, drop, fall, recession, depression, reduction, slump, worsening

☆develop 

evolve, advance, grow, improve, progress, flourish

☆difficulty 

handicap, hardship, adversity, challenge, complication, dilemma, perplexity, plight, trouble

☆early 

first, old, ancient, primitive, previous, former, remote

☆find

discover, come across, encounter, hit on, expose, notice, note, observe, recognize, spot, uncover

☆future 

what's next, prospect, approaching, expected, destined, forthcoming

☆how

describe, operate, explain, clarify, demonstrate, eludicate, expound, illustrate, interpret, account for 

☆inevitable

unavoidable, certain, destined, fated, inescapable, sure

☆militant

armed, belligerent, army, weapon, warlike

☆objection

commercial challenge, complaint, disapproval, opposition, protest, query, question, remonstration

☆obstacle 

bar, barricade, barrier, block, blockage, check, obstruction, problem, snag, hurdle

☆prevalent 

common, usual, prevailing, widespread, systematic, collective, general, popular

☆reduce

curtail, cut, decrease, halve, impair, lessen, moderate, trim, slash

☆role

function (provide, support, weaken, smooth, solve), job, position, duty, post, task, contribution 

☆recent 

modern, current, now, nowadays, today, contemporaneous, new, novel, present, up-to-date

☆simulate 

virtual, create, reproduce, pretend, imitate

☆significance

importance, milestone, impact, justification, gist, implication, point, purport, vital business, economic, financial, mercantile, profitable, pecuniary

☆worldwide

international, cosmopolitan, global, universal, ubiquitous, widespread, around the world

解决：solve, resolve, deal with, cope with, handle, tackle

消除：get rid of, eradicate, eliminate

依赖：rely on, depend on, count on

十分：very much, immensely, hugely, largely, greatly, enormously, tremendously

损害：damage, hurt, injure, harm, impair

给予：give, offer, render, impart, provide

发展：develop, cultivate, foster

优势：advantage, merit, virtue, benefit, upside, strength

缺陷：disadvantage, detect, demerit, drawback, downside, weakness