The first condition is that an informed, high-level official of the United States government has found that the targeted person presents an imminent threat of violent attack against the United States.

Finally, a Basis Function Neighbor ( BFN) preconditioning method is presented to solve the equation system obtained from the application of the moment methods. It is a physically based general-purposed preconditioning method for any type of basis function.

为了提高矩量法的计算效率，本文深入地研究了求解矩阵方程的预条件CGN方法，提出了一种以基函数邻居为基础的预条件方法&BFN预条件方法。

The scattering characteristics of various rectangular coaxial line discontinuities, with which a satellite beamforming network ( BFN) was built, were investigated by the finite difference time domain ( FDTD) method.

采用时域有限差分（FDTD）方法分析了构成卫星赋形天线馈电网络（BFN）的矩形同轴线各种不连续性结构的散射特性。

We find five brain areas, which are regarded as hinge brain areas in the task, through compare the relationship between the area betweenness and the average betweenness in BFN.

本文基于功能磁共振成像数据建立脑功能网络，通过比较区域介数值和整体平均介数值的关系找到了大脑在执行汉字认知任务时的5个枢纽脑区。

Model BFN Explosionproof and Anticorrosive High-pressure Sodium Lamp

BFN型防爆防腐高压钠灯

He gave the impression of a man whose heart was heavy.

他好像心事重重。

He did his impression of Tom Hanks.

他滑稽地模仿了汤姆∙汉克斯。

Their paintings were light and a bit fuzzy-they gave an impression of what the real world looked like.

他们的画很轻,有点模糊,给人一种真实世界的印象。

My first impression of him was favourable.

他给我的第一印象不错。

Each time left me with a new understanding of the country and a deep impression of the profound friendship between the Chinese and Australian people.

每次访问都让我耳目一新，也让我深深感受到中澳两国人民的深厚友谊。

He gives the impression of being a kind man.

他给人以亲切的感觉。

Clever lighting creates an impression of space in a room.

巧妙的照明会让人有屋子空间增大的感觉。

By providing healthy options, like salads and low-calorie sandwiches, they have at least given the impression of doing something about helping to fight obesity.

通过提供一些健康的选择，像沙拉和低热量的三明治，这些企业至少给人们留下了采取行动帮助对抗肥胖的印象。

Usually, when we see or talk to a person we have an impression of this person.

当看见一个人或者与一个人交谈的时候，我们通常会对这个人有印象。

He gave the impression of being a rather mild man.

他给大家的印象是一个性情相当温和的人。

Police have issued an artist's impression of her attacker.

警方公布了袭击她的人的模拟像。

This is an artist's impression of the new stadium.

这是一位艺术家对未来新运动场作的印象画。

I have a good impression of him.

我对他印象很好。

The red around the eyes gives the impression of being unwell and in need of looking after, while the wet-look hair provides a contrasting sexy feel.

眼部周围的绯红给人病弱之感，能激起异性的保护欲，而湿亮的头发则又产生一种反差的小性感。

She gives the impression of being very busy.

她给人的印象是特别忙。

She does a really good impression of the president.

她模仿总统模仿得很像。