鎖の強さは、その中の一番弱い輪に規定される。
/ 「鎖は、その一番弱い輪の部分以上には強くなれない。」 - ワトソン［ワトスン］（シャーロック・ホームズに） -- （アーサー・）コナン・ドイル (1859 - 1930): 『恐怖の谷』
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/ (Nina GarmanによるPixabayからの画像)
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A chain is no stronger than its weakest link.
/ "No chain is stronger than its weakest link." - Watson (to Sherlock Holmes) -- (Arthur) Conan Doyle (1859 - 1930): The Valley of Fear
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