Sternocostoclavicular arthro-osteitis is notinfrequent in Japan.
在日本,胸肋关节炎不是很常见。
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When the death of a loved one is sudden or unexpected, with lit-tle time to prepare, it is notinfrequent for mourners to believe the dead person is still alive.
Japan, which lies at the intersection of several tectonic plates, is regularly rattled by tremors of varying strength, with volcanic eruptions notinfrequent.