查询词典 half-life period

Seedlings of Parthenocissus heterophylla, Campsis grandiflora, Ficus pumila, Euonymus fortunei and Psychotria serpens were planted uniformly along the foot of a cement wall and then half of them were shaded from 90% of the natural light. After growing for a period of time, some indices, such as capacity to adhere to walls, covering landscape, leaf chlorophyll content, and Pn at different photosynthetically active radiation were investigated.

爬墙虎、凌霄、薛荔、扶芳藤和蔓九节5种爬藤植物沿水泥墙角均匀栽培，并作遮光处理，生长一段时间后观测它们对墙体的附着力、景观覆盖效果、叶片叶绿素含量，以及不同光合有效辐射下的净光合速率等指标。

The modeling of products varied in different periods and evolved into diverse orientations. Slating board style paid more attention to the speed, while the half-slating board style of the head-shaking style also gradually turned to focus on the speed. Therefore, the style of speed is the evolutional direction of motorscooters in every period.

台湾速克达机车的产品及造形的发展就在这些与不同环境因素的互动下，机身由斜板式愈趋演变成流线型，而摇头式不管是复古车及一般型也渐强调流线的造形，所以，造型设计均往速度感的方向演化。

For a square wave, the waveform is constant but switches sign every half period.

对于方波的波形不变，但每半年开关期间签署。

Good, stick-to-itive continues to look ~ word says network of my street amusement by after the hacker became clear, I also with respect to bud the thought ~ that learns hacker knowledge so, in Hei Ying black base inside mix ripe later ~ looked for a few to establish with age person Chinese teenager hacker is allied, there is bit of fame ~~~ after growing half an year I also go up in hacker X archives had released a text, everybody can look 63 period.

好了，有耐心的继续看看吧~话说我街娱网被黑客清了之后，我也就萌发了学习黑客知识的念头~所以，在黑鹰黑基里面混熟了之后~找了几个同龄人创办了中国少年黑客联盟，发展半年后有点名气~~~我也在黑客X档案上发布过文章啦，大家可以去看63期的。

The second half of his period in office was characterised by ever more strident criticism.

他政治生要的后半段几乎都伴随着尖锐的反对。

One half of the time average over the sum of the squares of The differences between successive readings of the frequency deviation sampled over the sampling period.

取样期内，被采样的频率离差的连续两次读取差值的平方总和。

With 31 minutes of the second-half gone the team's 10th foul of the period was committed, the 18th in the game.

切尔西继续战斗，在下半时的31分钟里，球队有十次犯规，整场比赛18次。

Quarter sales this year to maintain a popular quarter of the situation, in short supply, production and sales data over the same period to reach the best level in history, some of the basic product in the first half to complete the degree in sales last year.

今年2季度开始公司销售维持1季度的火爆局面，供不应求，生产销售数据达到了历史同期最好水平，部分产品上半年基本能完成去年的销售额度。

It is important that the period of the calibration clock (= Tref/clock divider) measures at least half of the maximum time interval.

因此校准时钟周期至少要占据最大时间间隔的一半，这是很重要的。

Help advance somebody's career can use turfy land (2) with n (1) mixture earth, cultivated before want discharge a few base manure, every 3 ～ between growth period are irrigated 4 weeks apply fluid fertilizer 1 times, hold basin ground wet, place in half shade place, avoid strong light point-blank.

栽培可以采用泥炭土(2份)和粗沙(1份)的混合土，栽植前要施放少量的基肥，生长期间每3～4周浇施1次液肥，并保持盆土湿润，放置在半荫处，避免强光直射。

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。