按实际可达到的尽可能低的英文

alara

as low as reasonably achievable

• 按:    press; push down
• 实际:    reality; practice
• 可:    approve
• 达到:    achieve; attain; r ...
• 的:    4次方是 The fourth po ...
• 尽可能:    as far as possible ...
• 低:    low