- 重点词汇
- 相关例句
The gas , which is sulphur-free , contains 89-99 % methane, up to 6 % ethane, and 3 % propane.
天然气不含硫, 含甲烷88-99%, 乙烷6%和丙烷3%.
词典精选例句
An epidemic resulted in overt measles in 99.9 per cent of the indigenous population.
一次流行引起99.9%土著居民患有明显的麻疹.
词典精选例句
In estimation, the most commonly used confidence levels are 90 percent, 95 percent, and 99 percent.
在估计中, 大多数情况下通用的置信度是90%, 95%和99%.
词典精选例句
