test-tubeadj.
'testtju:b
中文adj. 人工授精的；在试验管中作成的\nn. 试管；试验管；人工受精
人工授精的；在试验管中作成的
n. 试管；试验管；人工受精
词根词源
test-tube (n.)1809, from test (n.) + tube (n.). So called because it originally was used to test the properties of liquids. Test-tube baby is recorded from 1935.
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