The variations in trace element contents and ratios may hold up a mirror to the lake - level fluctuations and climatic changes, which, in turn, have exerted a direct and important effect on the sequence stratigraphic development. collectively, the reservoir rocks from the yanchang formation consist dominantly of the delta front subfacies subaqueous distributary channel and channel - mouth bar microfacies and delta plain subfacies subaerial distributary channel microfacies fine - grained feldspar sandstones and siltstones. the reservoir rocks have been subjected to three stages of diagenetic and porosity evolution : ( 1 ) the porosity reduction by the mechanical compaction and chemical pressure solution during the early diagenetic stage ; ( 2 ) the porosity increase by the dissolution during the a substage of the late diagenetic stage, and ( 3 ) the porosity reduction by the cementation and filling during the b substage of the late diagenetic stage
系統的儲層特徵研究表明，該區延長組儲層成因類型主要為三角洲前緣水下分流河道、河口砂壩及三角洲平原水上分流河道微相細粒長石砂巖、粉砂巖；儲層巖石經歷了壓實，膠結，溶蝕等成巖作用，歷經早成巖機械壓實和化學壓溶孔隙
縮小期、晚成巖a亞期溶蝕作用孔隙擴大期及晚成巖a亞期（ b亞期）膠結充填孔隙
縮小期三個成巖-孔隙演化階段；儲層物性總體上具有較低孔滲、低孔滲的特點，孔隙類型主要為粒間溶孔、殘余粒間孔隙、粒內溶孔、晶間孔及晶間溶孔，裂縫不發育，儲集巖排驅壓力和中值壓力較高，孔隙結構類型以細小孔-微孔隙，微細
喉-微
喉型為主。
Body ? streamlined flow path minimizes pressure drop. butt weld, venturi or flanged ends provide piping alternatives
閥體?流線形流道，最大限度減少壓降。對焊、
縮喉管或法蘭連接埠幾種可供選擇的連接方式。
Exhaust carrying sulfur oxides and powders enter the venturi scrubber to interact with the recovery solvent. when passing through the neck, the section surface constricts and the
含硫氧化物及粉塵廢氣自頂部進入文氏洗滌塔和洗滌液接觸流經
喉部，由於截面積
縮小，高速氣體將洗滌液噴成霧狀，而達到慣性沖擊去除粒狀物的目的。
Doroshuk said the technology dramatically reduces the time between a patient ' s initial consultation with a physician and his receiving treatment, allowing each of washington ent ' s four physicians to see between 30 to 35 patients a day
杜如舒克先生表示，這一技術顯著地
縮短了從病人接受檢查到接受治療之間的時間；它能夠讓華盛頓耳鼻
喉醫院平均每四名醫生每天能看30至35個病人。
Better agreements between computation results and experimental data were found using the models. ( 4 ) two phenomena in straight - convergent - divergent - straight microchannels were identified, which are different from the macroflow through experimental studies. one is that the first appearing sonic point position in microchannels is not near throat cross - section
（ 4 ）對等直收
縮擴張等直微管道中氣體流動的實驗研究發現兩個特異現象：其一為微管道內最早出現聲速點的位置不一定在
喉部附近，其二為微管道中的臨界壓比與常規值有很大差別。
As far as the sandstone adopted, the effect of effective stress on permeability lies in pressure effect of effective stress on pore and throat, and that of temperature lies in aggravating disaggregation of clay mineral with rising temperature and pressure effect of skeleton expansion on throat
就本試驗所用砂巖而言，有效應力對滲透率的影響主要在於有效應力對孔隙，尤其是對
喉道的壓
縮作用；而溫度對滲透率的影響則主要在於隨溫度升高而加劇的粘土礦物的分散作用以及砂巖骨架的熱膨脹對
喉道的壓
縮作用。
Ingestion of diluted hydrogen peroxide will cause mild throat discomfort, stomach pain, nausea, vomiting and diarrhoea, whereas that of concentrated hydrogen peroxide can cause stomach distension and for some rare cases, bowel perforation and gas embolism
（一）飲下稀釋的雙氧水可引致咽
喉輕微不適、胃痛、惡心、嘔吐及腹瀉，而飲下濃
縮的雙氧水則可引致胃部膨脹，有時甚至引起腸道穿孔及氣泡栓塞，但這種情況比較罕見。
His throat and neck muscles will contract which protect the soft tissues under the muscle but also lead to restricted airflow
他的咽
喉和頸部會收
縮，這樣可以保護肌肉之下的軟組織但是導致呼吸氣流受阻。
Leaves no residue iol air inside braking system, reduce non - functional possibility
壓力式剎車油更換排空機要接壓縮氣喉工作
