因此波前的相继位置即为次波的包络面。
Successive positions of the wave front are then given by the envelopes of the secondary waves.
从理论上推导了扩张室消声器内可能存在的高次波。
The existence of higher order mode waves in expansion mufflers is proved theoretically.
本文是研究利用天然地震PS转换波及PPP等二次波到时资料反演地壳上地幔速度结构的尝试。
An inversion of velocity structure of crust and upper mantle by using converted PS wave and multiwave PPP etc, is reported in this paper.
“一周送三次花，体贴又有风度。”波琳娜的母亲说。
"Three bouquets in one week. It's a very refined and thoughtful gesture," Polina's mother said.
在罗马尼亚体操事业青黄不接的时候，卡特琳娜波诺尔在一次全国比赛中脱颖而出，入选国家队。
During a period when Romanian gymnastics needed new talent, Catalina Ponor was spotted during a nationwide talent search and chosen to train with the national team.
但是，来自英国的妮奇布莱迪却在踏上红地毯前，一波十折，被迫取消婚礼十次。
But Nicky Pretty from the UK was forced to cancel her wedding plans ten times before finally walking down the aisle.
波顿给了德普一次挑战，在《剪刀手爱德华》(1990年)中出演爱德华一角：这部离奇古怪的童话讲述了有一双剪刀手的男孩不顾一切追寻真爱的故事。
Burton challenged Depp, casting him as Edward in Edward Scissorhands (1990) : a twisted fairytale about a boy with hands made out of scissors who yearns to find love.
工作人员向月球者一号发送了激光脉冲波，重新与它建立了联系，这是近四十年来的第一次。
A laser pulse was sent to Lunokhod 1, and contact was made with the rover for the first time in nearly four decades.
在波亚克的拉图尔酒庄，人们依靠马匹耕作葡萄园，就像14世纪那样。那个时候，葡萄藤第一次在这个庄园里种植。
At chateau Latour in Pauillac, horses plough the vineyards just as they did in the 14th century, when vines were first grown on the estate.
亨德森记起他是在一次去华盛顿出差的途中第一次与波拉德结识的。
Henderson recalled that he first met Pollard during a business trip to Washington.
波莉姨妈很懊恼，她居然忽略了这个明摆着的事实，因此错过了一次机会。
Aunt Polly was vexed to think she had overlooked that bit of circumstantial evidence, and missed a trick.
印第安纳波利斯最著名的赛事是印第安纳波利斯500，这是一场每年举行一次的、受欢迎的500英里（805公里）汽车赛。
Indianapolis is best known for the Indianapolis 500, which is a popular 500-mile (805 km) automobile race held once every year.
在这一波互联网热潮中，易手的资金远远少于上一次热潮。
Much less money is changing hands in the current dotcom boom than in the last one.
波莉姨妈很懊恼，她居然没注意到这个明摆着的事实，以致错过了一次机会。
Aunt Polly was vexed to think she had overlooked that bit of circumstantial evidence, and missed a trick. Then she had a new inspiration.
卡尔波夫和卡斯帕罗夫之间的比赛记录共144局，包括1984年9月到1985年2月间的棋王争霸赛中的40场和局，两人之间最近一次交手是在2002年。
Karpov and Kasparov have played each other in a record 144 games, including 40 drawn games in their world title bout between September 1984 and February 1985. The two last played each other in 2002.
成功地跳完一次“林波舞”后，他们把杆子放低，再做一次。
After a successful "limbo", they put the pole lower and do it again.
据南丹麦大学的埃尔维斯·格波·徐介绍，一次性口罩是塑料制品。
According to Elvis Genbo Xu from the University of Southern Denmark, disposable masks are plastic products.
河床队是阿根廷最成功的足球俱乐部，曾赢得卅三次甲组联赛冠军，波卡队廿九次。
River is Argentina’s most successful club, with 33 league titles to Boca’s 29.
从那以后陶波湖约有28次主要的喷发活动，其中最激烈的一次发生在公元186年左右。
Taupo has had about 28 major eruptions since then, with the largest and most violent occurring around 186 AD.
俄罗斯外长拉夫罗夫也说，希望明年春季在莫斯科举行另外一次和平会议，继续安纳波利斯会议上开始的努力。
Russian Foreign Minister Sergey Lavrov also expressed hope a new peace conference, to be held next spring in Moscow, will continue the work begun at Annapolis.
一旦建立了孤波，磁场方向的振动频率高达每秒十亿次以上。
Once the soliton is established, the magnetic orientation oscillates at more than a billion times a second.
喷发还产生了环绕地球7次的大气冲击波，冲击波产生的噪音5000千米外都能听到。
It also generated an atmospheric shock wave that travelled around the Earth seven times, and noise from the blast was heard up to 5, 000 km away.
瑞典神经病学专家卡尔 - 阿克塞尔·埃克波姆在1945年首次发现这种疾病，因此不宁腿综合征又被称为埃克波姆综合征（Ekbom syndrome）。
The condition was first described in 1945 by Swedish nerve specialist Karl-Axel Ekbom. As a result, RLS is sometimes known as Ekbom syndrome.
慢性压力模型通常被用于检测儿童时期压力的心理学影响；这是第一次该模型被用于检测儿童时期压力在心血管疾病方面的影响，波洛克博士说。
The chronic stress model most typically has been used to look at the psychological impact of childhood stress; this was the first time it was used to measure cardiovascular impact, Dr. Pollock said.
慢性压力模型通常被用于检测儿童时期压力的心理学影响；这是第一次该模型被用于检测儿童时期压力在心血管疾病方面的影响，波洛克博士说。
The chronic stress model most typically has been used to look at the psychological impact of childhood stress; this was the first time it was used to measure cardiovascular impact, Dr. Pollock said.
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