他们在找一种叫做“桶状胸”的病变，它描述的是一种趋向于演化为COPD次要症状的特别的身体姿态或形状 .
They're looking for a change known as "barrel chest," which describes a particular posture and body shape that tends to develop as a secondary symptom of COPD.
他们在找一种叫做“桶状胸”的病变，它描述的是一种趋向于演化为COPD次要症状的特别的身体姿态或形状 .
Why? They're looking for a change known as "barrel chest, " which describes a particular posture and body shape that tends to develop as a secondary symptom of COPD.
这个游动的小型甲壳纲动物名叫Phronima sedentaria，它们居住在樽海鞘的“桶状”尸体空壳中。
The roving Phronima sedentaria, a small crustacean, inhabits the hollowed-out bodies of dead barrel-shaped organisms called salps.
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