长时间地

Researchers have found that hookah smokers inhale more often and for longer periods than typical cigarette smokers.

研究人员已经发现水烟吸烟者吸入更经常地和更长的时间比一般的香烟吸。

An inland sea was present for a long time but is now slowly turning into an ice cap.

时间长就形成了一个内陆湖泊，但慢慢地会转化成冰盖。

Roosevelt, he wrote immodestly.

他毫不谦虚地写道："我在白宫工作的时间，比福兰克林·D·罗斯福之外的任何一位总统都长。"

It is a reminder that in every office a group of people are stuck together for an improbably large number of hours, day in, day out.

需要提醒的是，在每间办公室，都有一群人日复一日地困在一起，时间长得令人无法想象。

For a long time cities were the only large collections of people, so you could use the two ideas interchangeably.

很长的时间以来，城市是唯一的人群的大集合体，因此你可以交换地使用这两个概念。

"You've been sick for a long time, Jay," he said softly.

"你已经生病了有很长的一段时间，鸟"，他柔和地说。

When he finally caught the bus home to his dinner, still with his wellies on, croaked after hauling wooden boxes of haddock or hanging kipper kilns in the roof, other passengers would say "What a horrible smell of fish!" and change their seats.

当他最后熬到晚饭时间，赶上回家的公共汽车时，脚上仍然套着（因为长期"服役"——他穿着这双靴子一次次地从鱼棚顶取装鳕鱼的木盒子，或是往棚顶挂腌鱼用的窑炉）已经吱嘎作响的长筒靴，邻近的乘客会从他身边走开，换到别的位子上，同时抛出一句"好臭的鱼味！"

In this sentence,"stay" serves as a link verb, meaning continue to be in a particular state without changing.

stay作连系动词，表示没有变化地持续相当长的一段时间。

Simulation with NS -2 shows that the distribution of lognormal can be used to describe the duration of longest lifetime paths.

模拟实验表明，利用对数正态分布可以很好地描述移动自组网的最长生命期路径持续时间。

Both LDPC codes and OFDM technology are studied in this paper. The working and the results obtained are summarized as follow:1. The definition of LDPC codes and its coding/decoding ideas are systematically summarized, a general algorithm of changing any parity-check matrix to lower triangular form, which is suitable for quick encoding, is given out, along with a girth checking algorithm. Absolutely random LDPC codes construction is improved, a new half random construction of LDPC codes with linear time coding and no 4-cycles is brought out.

系统地阐述了低密度校验码的定义及编译码原理，提出了一种将任何校验矩阵变换成适于快速编码的近似下三角形式的通用算法及一种围长检测算法，对完全随机的校验矩阵构造法进行了改进，提出了一类消除4环且可近似线性编码的校验矩阵半随机构造法，仿真表明，在高编码效率情况下，改进后的半随机构造法，其性能稍优于完全随机构造法，并可以线性时间编码，因此更适合实际应用。

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。