可述说的

He is at home in any society; he has common ground with every class; he knows when to speak and when to be silent; he is able to converse; he is able to listen; he can ask a question pertinently, and gain a lesson seasonably, when he has nothing to impart himself

与任何群体的人相处，他都融洽自然；与任何人相交，他都有共同之处。他明白何时该说话，何时该沉默；他善于交谈，也善于倾听；当自己没有什么可述说的时候，他能够中肯地提出问题，并适时地接受教育

He is at home in any society; he has common ground with every class; he knows when to speak and when to be silent; he is able to converse; he is able to listen; he can ask a question pertinently, and gain a lesson seasonably, when never in the way; he is pleasant companion, and a comrade you can depend upon; he knows when to be serious and when to trifle, and he has a sure tact which enables him to trifle with gracefulness and to be serious with effect.

他明白何时该说话，何时该闭嘴；他善于交谈，也善于倾听；当自己没有什么可述说的时候，他能够中肯的提出问题，并适时的接收教诲；他总是跃跃欲试，但从不妨碍他人；他是一个让你感到愉快的伙伴，让人可以依赖的朋友；他懂得何时应当严肃，何时可以嬉闹；他通脱而机智，嬉闹时不是优雅，严肃时不怒自威。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。