Vocabulary
| secure |
| extensive |
| sustainable |
| polluted |
| wasteful |
| serious |
| unfair |
| inequality |
| bullying |
| tax increase |
| ecosystem |
| global warming |
| greenhouse gas |
| plastic waste |
| working conditions |
| religious conflict |
| unemployment rate |
| declining birthrate |
| aging population |
| life expectancy |
| public pension system |
| population growth rate |
| social welfare system |
| carbon dioxide emissions |
再生速度
表示設定
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