collect all the burnable rubbish from the different bins and put it in one bag (ready to take outside)
「可燃ごみをまとめる」= gather together all the burnable rubbish / put all the burnable rubbish in one bag / collect all the burnable rubbish from the different bins and put it in one bag (ready to take outside)
ボキャブラリー
可燃ごみ = burnable rubbish (米:burnable trash/garbage)
まとめる = gather together / collect / put in one (bag)
all = 全て、全部
one bag = 一つの袋
different = 違う、それぞれの
bin = ゴミ箱
ready = ~の準備
take outside = 外に出す