His patents completely believe in him. He can do things at random.
Giải chi tiết:
at random = ngẫu nhiên
A. bị đe doạ
B. theo ý thích
C. cùng lúc
D. trong tầm tay
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.