It's important to arrange the ingredients in a bento so that it's colourful and three-dimensional.
When arranging a bento, it is important to make it colourful and three-dimensional.
「お弁当はカラフルに立体的に盛り付けるのが大切」＝ It's important to arrange the ingredients in a bento so that it's colourful and three-dimensional. / When arranging a bento, it is important to make it colourful and three-dimensional.
ボキャブラリー
important ＝ 重要、大切
arrange ＝ 盛り付ける
ingredients ＝ 材料、おかず
colourful ＝ カラフル （米語のスペル: colorful)
three-dimensional ＝ 立体的
when ＝ ～の時
make ～ ＝ させる
イギリス 
