戊烷沥青质中以迫位缩合的芳香环系结构为主，胶质组分中渺位缩合与迫位缩合的芳香环系结构各占相当比例。
The aromatic structure of pentane asphaltenes is mainly peri condensed, while for resins the proportion of cata condensed and peri condensed aromatic structures is comparable.
1606年，在利玛窦的不断催迫下，罗马方面派遣了一位深懂天文的意大利籍熊三拔神父来到中国。
In 1606, in answer to pressing requests sent by Ricci, Sabbatino De Ursis, an Italian well equipped in astronomy arrived.
经典迫牌手法的教学，来自一位著名的手法魔术导师。
A classic sleight taught by a master in this incredible step by step DVD!
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