桨的一种

A novel photocatalytic reactor, which can use sun light and graniform photocatalyst, was developed and evaluated. Hydraulics studies show that the actual mean residence time was approximately 1. 5 to 2 times greater than the theoretical mean residence time, which is of great advantage for degrading the pollutants in the reactor, and that the high reaction rate can be obtained by increasing the rotational speed.

设计了一种新型提升式圆盘多相光催化反应器(exalting round-platephotocatalytic reactor，ERPPR)，该反应器的主要特点是能够利用太阳光和粒状催化剂，通过对ERPPR水力学特性的研究发现，该反应器的实际平均水力停留时间约为理论平均停留时间的1.5到2倍，反应器内循环流量与提升桨转速成正比。

Any of various aquatic bugs of the family Notonectidae that swim on their backs by means of broadened,oarlike hind legs.

仰泳蝽一种属于松藻虫科的水生虫类，用它们宽阔的、桨状的后腿在水上仰泳

Any of various aquatic bugs of the family Notonectidae that swim on the ir backs by means of broadened,oarlike hind legs.

仰泳蝽一种属于松藻虫科的水生虫类，用它们宽阔的、桨状的后腿在水上仰泳

Any of various aquatic bug s of the family Notonectidae that swim on their backs by means of broadened,oarlike hind legs.

仰泳蝽一种属于松藻虫科的水生虫类，用它们宽阔的、桨状的后腿在水上仰泳

I saw a report at last few days, it told that several college studentd from Yangzhou University, they engaged into the "Boat women"in Little Weat Lake, and responsible for the visitors, they help them as scullers and sing boat melodies.

在前两天看报时，看到有几位扬州大学毕业的女大学生，应聘瘦西湖风景区的船嫂，专门负责为游客摇桨，唱船调，这无疑也是一种很好的就业渠道。

It had been loaded the evening before at our door, half a mile from the river, with potatoes and melons from a patch which we had cultivated, and a few utensils, and was provided with wheels in order to be rolled around falls, as well as with two sets of oars, and several slender poles for shoving in shallow places, and also two masts, one of which served for a tent-pole at night; for a buffalo-skin was to be our bed, and a tent of cotton cloth our roof.

出发前的晚上，船还停在家门口，距河约半英里，我们往船上装满了自家菜园里种的土豆和甜瓜，还有一些瓶瓶罐罐。我们还带了几只轮子，以便在遇到瀑布时做滚动用，两副桨，几根船篙在遇浅水时作撑船用，当然还带了两根桅杆，其中一根是用来晚上时支帐篷用的。

A device,such as a looped rope ,hook and eye,strap,or grommet,used to hold or fasten loose rope s,spars,or oars in position.

环索一种类似于绳圈、钩子和线圈、皮带或金属索眼的装置，用于把松了的绳索、桅杆或桨保持或紧固在其位置上

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失