A warning printed on a makeshift lifebuoy says: " This is not a life-saving device. Children should be accompany by their parents."
Giải chi tiết:
accompany → accompanieed (dạng bị động: should be accompanied). A warning printed on a makeshift lifebouy says: "This is not a life-saving device. Children should be accompanied by their parents." (Cảnh báo in trên phao cứu sinh tự chế ghi rõ: "Đây không phải dụng cụ cứu hộ. Trẻ em nên được đi kèm cùng cha mẹ.")
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.
Biogas can be utilized for electricity production, cooking, space heating, water heating and process heating.
Population growth rates vary among regions and even among countries within the same region.