He has never exhibited the self-confidence, bordering on arrogance, of his predecessor.他从未表现出他前任的那种近乎傲慢的自信。Lacking self-confidence and maturity, many teenagers are left feeling very vulnerable.许多十几岁的孩子既缺乏自信又不够懂事，所以感情上十分脆...
Normally a point in space is identified by means of coordinates.空间中的点通常是依靠座标来定位的.We carry out a transformation to spherical polar coordinates.我们变换成球极坐标.For a system, Hamiltonian is invariant under any translation of spat...
The Hibiscus, Azalea and Oleander are some common shrubs.大红花, 杜鹃和夹竹桃是一些常见的灌木.Hawaii's best mangoes grew at Hanakai, its most brilliant hibiscus and its best horses.夏威夷最肥美的芒果, 最鲜艳的木槿和最纯种的骏马都在海那卡伊.In its natural habit...