一次

This paper proposes a novel zero-voltage and zero-current-switching pwm three-level converter, which introduces a block capacitor in series with the primary winding of the transformer to make the primary current to reduce to zero during zero state.

提出一种新颖的零电压零电流开关PWM三电平直流变换器，它是在基本的三电平直流变换器的变压器一次侧串入一个阻断电容，使一次电流在零状态时减小到零。

One of his eyes was hurt in accident,but after performing the difficult operation,he revived immediately.

他的一只眼睛在一次事故中受了伤，但经过一次高难度的手术后，他迅速恢复了视力。

And to this very day, the victory and independence of Scotland is traced to a spider who kept trying again and again to spin her web in a cave and inspired the king of Scotland, Robert the Bruce.

正是因为那只在洞穴内一次又一次尝试结网的蜘蛛，让苏格兰国王罗伯特布鲁斯获得了启发，从而使苏格兰迎来了胜利和独立的这一天。

The relationships of the characters is quite complex: Otohiko and Saki are Takase's children.

这样的人是有一种很消极的力量，他们会一次一次地投入新的纠

From here, the wheel of the year ends with the third and final harvesting and the beginning of another year of Samhain.

从这里开始，一年的周期在第三次，也就是最后一次的收成结束，下一年的Samhain又开始了。

British Home Office call this plan " project of database of midway intercept modernization ", tell network and telegraphic operation dealer, technology of network black box will be self-recording communicate in the every time of British churchyard, each email and content of visit of every time website, store record content in central database.

英国内政部称这项计划为"中途拦截现代化数据库项目"，并告知网络和电信运营商，网络黑匣子技术会自动记录在英国境内的每一次通话、每一封电子邮件以及每一次网站访问内容，并把记录内容存储在中心数据库。

The yield of wool shorn from a sheep at one time.

一次剪得的羊毛：从一只羊身上一次剪得的羊毛

But the fact is that one can be honest about one's sinfulness again and again and again and again.

但一个人可以一次又一次只诚实的认自己的罪。

As each slaty wall of water approached, it shut all else from the view of the men in the boat, and it was not difficult to imagine that this particular wave was the final outburst of the ocean, the last effort of the grim water.

每逢一垛暗蓝色的水墙涌来，船上的人便给挡得什么也看不见，因而也就不难设想，这个浪头是大海的最后一次爆发，是海水的最后一次逞凶。

"I really shouldn't," said Bunny,"but maybe I'll look after you, just this once." So he found a stick and lifted the ugly snake out of the pit and onto the grass nearby.

"我真的不能这样做"邦尼说，"但我可以照顾你一次，仅此一次，下不为例"然后邦尼找到一根木棍把那条丑恶的大毒蛇从山洞里拉出来到草丛里一边。

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。