Teaching methods need careful study.

Detecting sonar pulse transmitted by an active sonar, it is sonar pulse detection.

声呐脉冲侦察是利用目标主动声呐发射的脉冲信号来探测目标的技术.

The digital active sonar has many advantages, but we have many problems to realize them.

首先介绍数字式主动声呐的优点及实现上的特殊困难.

A computing model for the self-noise due to sonar cavity is established by using SEA method.

利用统计能量分析法建立了湍流边界层激励下水下航行器声呐腔自噪声水动力分量的计算模型.

A fashion that does not reach the streets is not a fashion.

穿不上街的时尚,就不是时尚.

There should be more police walking about than present.

需要有比现在更多的警力上街巡逻.

Qian Men Jianguo Hotel is next to the famous Liulichan Cultural Street.

前门建国饭店与著名的琉璃厂大街相邻.

This is a question of great concern to us all.

对建国以后的十七年怎样估计,这是大家很关心的问题.

Jianguo, I've heard so much about your cousin Mr. Wang.

建国, 我听说过许多关于你表兄王先生的事.

The country became a British protectorate upon its foundation in 1914.

1914年建国时，这个国家成为了英国的保护国。

Janet is a student of Grade Three.

詹尼特是个三年级的学生.

I hurt my arm and Jenny helped me.

我伤了我的胳膊,詹尼帮助了我.

Jennifer slapped David after he came on to her.

詹尼佛在大卫对她轻薄之后打了他一巴掌.

Mr. Jones, Brian and Jenny arrive at the hospital.

琼斯先生, 布莱恩和詹尼来到了医院.

What does Jenny Rodriguez get for all this?

詹尼罗德里格斯能得到什么好处 呢 ?

Will you see Ian today, Jenny?

詹尼,您今天会见到伊恩 吗 ?

I can't give you the book; I've promised it to Susan.

我不能把这本书送给你, 因为我已经答应把它送给苏珊了.

He has promised most of his books away to his friends.

他已答应把他大部分书籍送给他的朋友们.

My brother lost his favorite toy, which our grandma gave him, in the park.

我的兄弟在公园里丢失了他最喜欢的玩具，那是我们奶奶送给他的。

They generously provided us with free T-shirts and stick-on decorative stickers.

他们大方地送给我们免费的T恤和可粘贴的装饰贴纸。

A brilliant book was presented to me by my older sibling.

我的年长的兄弟姐妹送给了我一本出色的书。