Another is that the number of humans who venture into polar bear territory remains somewhat low.
另一个理由则是,冒险进入北极熊领地的人还是少之又少的。
2
The 12 of lowpolar components of Anabasis Aphylla L. were separated and identified by gas chromatography-mass spectrometry. They are naphthalene and azulene species.
采用气相色谱-质谱测定无叶假木贼低极性化学成分,分离鉴定了12个化合物,它们是萘类与类化合物。
3
If the silane has no polar group, the surface free energy is low.