跟不上: not able to keep up with...
孤立: isolate, isolated...
遏制: to check, to contain, to hold back, to keep within limits, to constrain, to restrain...
斑: spot, colored patch, stripe, spotted, striped, variegated...
高速公路: expressway, highway, freeway...
评选: to select on the basis of a vote or consensus...
系: to connect, to arrest, to worry...
替换: to exchange, to replace, to substitute for, to switch...
忧郁: sullen, depressed, melancholy, dejected...
溪: creek, rivulet...
