"One after another people that came to the bulletin board pelted slander and abuse at him."
"One after another people that came to the bulletin board pelted slander and abuse at him."
"one after another" 「次々と」"one by one" も使えます。
"people that came to the ~ "「〜に来ていた人達は」
"bulletin board" 「その掲示板」
"pelted ~" 「投げる」・「〜を浴びせた」"hurled" も言えます。
"slander and abuse" 「誹謗中傷」
"at him" 「彼に」
オーストラリア 
