Sometimes when I hear the news, I feel very miserable.
Giải chi tiết:
miserable = upset : đau khổ, buồn phiền.
Nghĩa các từ khác: disappointed = thất vọng, frightened = sợ hãi, confused = bối rối
Population growth rates vary among regions and even among countries within the same region.
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.