A tree is created and maintained by the switch for every VLAN according to the mark affiliated in BPDU. It can cut down the delay from the block state to transmitting state obviously and improve the real-time characteristic in the Ethernet.

In the same condition, testing shows that this self-adaptive-interval sending BPDU data-package algorithm spends network bandwidth more reasonably and reduces the convergent-time more effectively.

测试表明在其他条件相同的情况下，该自适应时间间隔发送BP-DU数据包算法比定时发送BPDU数据包更合理地利用了网络带宽，更有效地减小了收敛时间。

However, according to the standard of 802.1D, it is impossible to forward BPDU segment with VLAN TAG.

然而，按照802.1D标准BPDU不带VLAN tag，而且要求所有网桥不能转发BPDU；

BPDU and network management messages are processed.

BPDU和网络管理消息仍将被处理。

The effect of E.coli endotoxin and the protective action of anisodamine ( 654-2) on the bovine pulmonary endothelial cell ( BPEC) in vitro were investigated.

作者研究了精制大肠杆菌内毒素对体外培养的小牛肺血管内皮细胞的影响及654-2的保护作用。

The cluster set generated by BPEC is proved to be a Maximum Independent Set, which can cover all network nodes.

由BPEC算法产生的簇头集合被证明是一个最大独立集，簇头集合能覆盖网络的所有节点。

Childhood is a happy period in one's life, and the world of children is a happy world.

童年时代是人生中一段幸福的时期，儿童的世界是一个幸福的世界。

Adolescence is a key period in one's life.

青春期在人的一生中至关重要。

A period in one's life which begins with his asking where he came with his asking where he came from and ends with his refusing to answer where he is going.

人生中的一个阶段，以问自己从哪里来开始，以拒绝回答自己到哪里去为止。

A man that is young in years may be old in hours if he have lost no time.

如果一个年轻人把时间都浪费掉了，那么他会在一瞬间变老。

Do we know what the biological or chemical agent is yet?

我们知道这个生物或者化学制剂是什么了 吗 ?

The doctor mixed a bottle of medicine for me.

医生给我调制了一瓶药.

Don Corleone himself mixed drinks and brought one to each man.

考利昂老头子亲手调制饮料,给每人递了一杯.

A network is not important. Your value to the network matters more.

网络并不重要, 更要紧的是你的价值对于网络.

It's not important who plays, it's important to maintain Juve's high levels.

谁上阵并不重要, 最重要的是令尤文图斯维持高水平.

This step is not important if you t using the night.

如果你不打算在夜里行动,这一步就不重要.

The doctor said the appendix is not important for us.

那个大夫说阑尾对我们来说并不重要.

This business is not important enough to merIt'special efforts.

这笔交易无关紧要,不值得特别努力.

Like all is not important, warm spring flowers will open!

像所有并不重要, 温暖的春天花朵开放!

The value in dollars is not important, but the pleasure it gives is.

金钱上的价值是次要的, 重要的是从中获得的乐趣.

'Though it's not important,'repeated Carton in the same mechanical way -'though it's not important.

“ 虽然这并不重要, ”卡尔顿以同样的机械方式重复道 —— “ 虽然不重要,确实不重要,不重要.