雅思写作同义词替换 人类 在当代 the human race; humanity; humankind at pressent; currently; in contemporary society; in present-day society 解决 破坏 影响 明显的 从事 积极的 tackle; address;resolve; combat destroy; devastate;jeopardize have an impact/influence/effect on sb. manifest;apparent;evident;obvious carry out; conduct;perform; positive;beneficial; advantageous 消极的，坏的 baneful;deterimental; negative 好处和坏处 无处不在的 大量的 advantages and disadvantages; strengths and weaknesses prevelent;pervasive a host of; a vast number of; a great deal of; a vast number of 需要 增进 贫穷的 保护 富裕的 污染 采取措施 require; necessitate;call for enhance; boost impoverished;deprived preserve;protect affluent; wealthy contamination; pollution Take measures to do sth.; take steps take actions