While OPC is not a cause of death, it can cause oral pain and make swallowing difficult.
虽然鹅口疮不会导致死亡，但却可能导致口腔疼痛，吞咽困难。
Real black holes’ light-swallowing abilities make them notoriously difficult to observe directly, though their gravitational effects on their surroundings can be seen.
尽管能看到黑洞对周围的引力，但由于真正黑洞的噬光力而使直接观察黑洞异常困难。
Up to 40 percent of patients given a common chemotherapy drug suffer from the painful sores known as oral mucositis, which can make eating and swallowing difficult.
接受普通化疗的患者中高达40%患有痛性口腔溃疡亦为粘膜炎，这能够产生咀嚼和咽食困难。
Fail to be a course, one is difficult to cook the bitter dish swallowing, but you need to eat down it.
失败是一道菜，一道难以下咽的苦菜，但你要把它吃下去。
Fail to be a course, one is difficult to cook the bitter dish swallowing, but you need to eat down it.
失败是一道菜，一道难以下咽的苦菜，但你要把它吃下去。
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