sentence1: responsive microgels are nanometre-or micrometre-sized hydrogel particles dispersed in aqueous suspensions , able to swell and retain large amount of water in response to slight changes in the environmental stimuli .
sentence2: responsive microgels are aqueous dispersions of nanometre-or micrometre-sized hydrogel particles , able to swell and retain large amount of water in response to slight changes in the environmental conditions .