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time histoiy | |||
time history | |||
history | |||
time-variation | |||
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time history |
随时间的变化 : 40 phrases in 13 subjects |
Automobiles | 4 |
Bridge construction | 5 |
Business | 1 |
Earth sciences | 1 |
Electronics | 2 |
General | 4 |
Hydroelectric power stations | 1 |
Metallurgy | 3 |
Plastics | 2 |
Radio | 1 |
Space | 3 |
Technology | 12 |
Textile industry | 1 |