"Criminal cases are continually hinging upon that one point (уголовные дела постоянно упираются в эту проблему; continually — непрерывно, все время; to hinge — крепиться петлями, прикреплять на петлях; зависеть от; быть тесно связанным; hinge — петля /напр., дверная/; шарнир; крюк; point — пункт, момент). A man is suspected of a crime months perhaps after it has been committed (человека заподозрили в преступлении, которое совершено, возможно, несколько месяцев назад: «месяцами, возможно, после того, как оно было совершено»). His linen or clothes are examined (осматривают его белье или одежду), and brownish stains discovered upon them (и обнаруживают коричневатые пятна: «и коричневатые пятна обнаруживают на них»). Are they blood stains (это пятна крови), or mud stains (или грязь: «пятна грязи»), or rust stains (или следы ржавчины), or fruit stains (или пятна фруктового сока), or what are they (или что)? That is a question which has puzzled many an expert, and why (это вопрос, который озадачивал не одного эксперта, а почему)? Because there was no reliable test (потому что не было надежного теста). Now we have the Sherlock Holmes' test, and there will no longer be any difficulty (теперь у нас есть тест Шерлока Холмса, и больше трудностей не будет)."

His eyes fairly glittered as he spoke (его глаза просто сверкали, пока он говорил), and he put his hand over his heart (и он положил руку на сердце) and bowed as if to some applauding crowd conjured up by his imagination (и поклонился словно какой-то аплодирующей толпе, вызванной его воображением; to conjure up — вызывать в воображении).

"You are to be congratulated," I remarked, considerably surprised at his enthusiasm (вас следует поздравить, — заметил я, довольно-таки удивленный его энтузиазмом; considerably — значительно, много).

hinge [hn], /to/ suspect [s'spekt], linen ['lnn], bow [bau], enthusiasm [n'ju:zaezm]

"Criminal cases are continually hinging upon that one point. A man is suspected of a crime months perhaps after it has been committed. His linen or clothes are examined, and brownish stains discovered upon them. Are they blood stains, or mud stains, or rust stains, or fruit stains, or what are they? That is a question which has puzzled many an expert, and why? Because there was no reliable test. Now we have the Sherlock Holmes' test, and there will no longer be any difficulty."

His eyes fairly glittered as he spoke, and he put his hand over his heart and bowed as if to some applauding crowd conjured up by his imagination.

"You are to be congratulated," I remarked, considerably surprised at his enthusiasm.