一轮资料资源简介：

重点单词
characteristics   environment     analyze         expert           instruct
deliver          extra            physician       spread           remove
attend          evidence         pollute          foresee          cure
handle          pump            challenge       neighborhood    victim
affect           valuable          source         face             frighten
severe          attack            gather         solve             confuse
absorb          suspected        multiply        clue              enquiry
investigation     announce         movement     universe          reject
against          theory            privately       create            encourage
replace          enthusiastic       gradually       ignore           cautious
arise            punish            backward       solar            knowledge