|
|
| 11. | "What is more, playgrounds are usually outdoors, so the gas isn't strong enough to affect people's health |
| "在高温和强烈光照的条件下,这种塑胶材料才会发出少量有毒气体,"他说。"而且,操场通常都在户外,气体浓度不足以影响人们健康。" |
|
|
| | |
| 12. | The Hydrogen gas is usually the first type of gas consumed in a star and then other gas elements such |
| 最早被燃烧的恒星气体通常是氢气，随即开始消耗其它气体元素，如碳、氧和氦。 |
|
|
| | |
|
|