In particular, the claims made for the transport of inhibitors through hardened concrete need to be assessed.
特别是阻锈剂通过硬混凝土的渗透，是需要评估的。
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They are not through-hardened to avoid becoming brittle and prone to breakage.
他们不进行通体淬火的原因是防止变脆易遭破坏。
He offers the analogy of a conveyor belt, on which the individual passes through successive stages: neglected child, disruptive pupil, anti-social teenager, young offender, hardened criminal.
ECONOMIST: Oliver Letwin's big new idea about crime
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