复数： tars
易混淆的单词： TARTar

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Instead the core may have formed from carbon-rich fragments , like tar .

相反，行星核心的构成可能是富含碳的物质，例如焦油。

Tar sands and biofuels represent only a small part of global energy use .

沥青砂及生物燃料仅占全球能源消耗的一小部分。

The road was covered with tar .

道路被柏油覆盖着。

Moreover , hookah smoke contains tar , heavy metals and other cancer-causing chemicals .

更糟的是，水烟里含有焦油、重金属和其他易致癌的化学物质。

Above : researchers have almost finished freeing zed 's skull from the matrix of sand and tar that preserved it .

上图：研究者们已经从沙土和焦油的混合物中清理出了崔德的大部分头骨化石。