1.They believe people eat up to 11,000 pieces of plastic in their food each year.
up to多達
I can take up to four people in my car.
我的車能載 4 個人 。
2.Sixty pieces of microplastic may not seem a lot but it will build up over time.
build up(使)積聚;(使)逐漸增加
Deposits of plaque build up between the tooth and the gum.
牙齒和牙齦之間會滋生牙斑 。