| 单词 | allowable level |
| 释义 | allowable level They wore special overalls and opened the valve quickly but in about 10 minutes were exposed to radioactivity 100 times more than the allowable level for a year. Times, Sunday Times In particular, look for a welcome increase in the allowable level of tax-favoured contributions to registered retirement savings plans. Globe and Mail Today, workers are required to use respiratory-protection measures when concentrations of silica exceed allowable levels. Retrieved from Wikipedia CC BY-SA 3.0 Exemptions are made according to aesthetically based allowable levels, and do not relate to health concerns. Retrieved from Wikipedia CC BY-SA 3.0 The city, however, states that the metal levels are well below the federal allowable levels. Retrieved from Wikipedia CC BY-SA 3.0 |
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