| 1. | It is therefore completely impossible to avoid ionising radiation altogether . the average background radiation as about 2 msv per year
换言之，我们不可能完全避免电离辐射，每年接触到的本底辐照量平均为两毫西韦特单位。 |
| 2. | A special case is made for pregnant aircrew . once pregnancy is declared , the maximum dose equivalent permitted is 1msv for the remainder of the pregnancy
怀孕的机组人员在证实怀孕后，在馀下怀孕期中最高辐照量为一西韦特。 |
| 3. | A special case exists for pregnant workers because of the potential for radiation to damage the developing foetus . after the pregnancy is declared , the dose limit is 1 msv for the rest of the pregnancy
怀孕工人的情况亦有所不同，由于辐射有可能对成长中的胎儿造成损害，故一旦怀孕，在怀孕期间的吸收剂量便不能超过一个毫西韦特单位。 |
| 4. | Workers whose annual dose is likely to exceed 6 msv are required to be classified as radiation workers . this requires that their exposure be measured and regularly monitored and that they be subject to periodic medical examinations
全年吸收剂量有可能超过六个毫西韦特单位的人士，便被列为在辐射下工作的人士，需接受辐射接触量的量度和定期监察，并需定期进行身体检验。 |
| 5. | For the general public , i . e . those persons who do not have contact with radiation as part of their work , the recommended limit is 1 msv per year . for persons whose work requires that they have contact with radiation , the limit is 20 msv per year
一般而言，工作时不需经常接触到辐射的人士，建议上限为每年一个毫西韦特单位因工作关系经常接触辐射的人士，上限则为每年二十个毫西韦特单位。 |
| 6. | Particulate radiation is generally more damaging in biological systems than electromagnetic . the unit is the sievert , but as it is a very large unit the millisievert which is a thousandth of a sievert is more common as is the microsievert , a millionth of a sievert
至于量度辐照量的单位为西韦特sievert ，但西韦特是一个大单位，故此一般以其千分之一即毫西韦特单位msv或以百万分之一即微西韦特单位msv来量度。 |
| 7. | For annual doses calculated as less than 6 msv , no further action is required , but it is recommended that where annual doses could exceed 4 msv , the monitoring of individual exposures by computer program is conducted to ensure that no individual dose exceeds 6 msv
如年辐照量低于六毫西韦特，则无须采取进一步措施，但建议年辐照量超过四毫西韦特的人士需接受以电脑程式进行的辐照量监测，以确保该人士的每年辐照量不会超过六毫西韦特。 |
| 8. | The international commission for radiological protection icrp estimates that an additional death rate of 12 . 5 persons per million for every msv of exposure . this means that if a million people were given 2 msv of radiation , the expected additional death rate from cancer would be 25 additional persons or 230 , 025 instead of 230 , 000 persons out of a million dying from naturally occurring cancer
据国际放射防护委员会估计，每一百万人每接触到一毫西韦特辐照量所引致的死亡率增幅为12 . 5 % ，换言之，如一百万人接触到两毫西韦特的辐射，因死亡的人数估计会增加二十五人，亦即每一百万人会有二十三万零二十五人自然死于癌症。 |
