口螺

The snail was found to have an indirect developmental type in the early development. The fertilized eggs were oval-shaped and discoidal cleavage. Embryonic development stages were divided into cleavage, blastula, gastrulae, trochophore, and intra-membrane veliger. Larval development stages included veliger, late veliger and crawling larvae metamorphosed to juvenile.

结果表明：黄口荔枝螺卵囊高度平均为7.33 mm，卵粒数量平均为165粒；黄口荔枝螺的早期发育属间接发生型，受精卵呈椭圆形，卵裂为盘状卵裂；在卵囊内，胚胎发育包括卵裂期、囊胚期、原肠胚、膜内担轮幼虫、膜内面盘幼虫；幼虫发育包括面盘幼虫、后期面盘幼虫和匍匐幼虫。

Correct, the demolition of the gas valve is the gas valve from the spare machine work location, the body upperend in the jaws of a pair of pliers-bed of one side, the seat of the valve body with M8X 25 hexalobular heicobacter of hexalobular head alignment valve set's center position, hupensis the other side of the top in the jaw, to increase the contact area on the screw to prevent bursting valve set, at the same time makes it easy to remove.

气阀正确的，拆卸方法是，把气阀从机器工作位置拆下来，将阀体的一头放在钳台的钳口一边，阀体的阀座边用M8X 25内六角螺杆的内六角头对准阀套的中间位置，螺的另一边顶在钳口上，目的是增加螺杆的接触面积，防止顶破阀套，同时便于取出卡簧。

Correct, the demolition of the gas valve is the gas valve from the spare machine work location, the body upperend in the jaws of a pair of pliers-bed of one side, the seat of the valve body with M8X25 hexalobular rationl hexalobular head alignment of valve set's center position, hupensis the other side of the top in the jaw, to increase the contact area on the screw to prevent bursting valve set, at the same time makes it easy to remove.

气阀正确的，拆卸方法是，把气阀从机器工作位置拆下来，将阀体的一头放在钳台的钳口一边，阀体的阀座边用M8X25内六角螺杆的内六角头对准阀套的中间位置，螺的另一边顶在钳口上，目的是增加螺杆的接触面积，防止顶破阀套，同时便于取出卡簧。

Bamboo Island abalone breeding success have been achieved; fructose Qingkou Bay Eco-breeding base, Dongfeng Lo test base culture, the East Australian white oyster aquaculture pilot bases completed; white oysters, Dongfeng Lo, the smooth promotion of culture mussels; asparagus, breeding new varieties of sea cucumber and other test results.

竹洲岛鲍养殖取得阶段性成功；果糖湾青口生态养殖基地、东风螺养殖试验基地、东澳白蚝养殖试验基地建设完成；白蚝、东风螺、青口养殖推广顺利；龙须菜、海参等新品种养殖试验效果良好。

Observations on the experimental infection of Exorchis ovariolobularis in Stenothyra toucheana and the whole life cycle of this trematode species were repsrted.

本文男性报告叶巢外睾吸虫幼虫期人工感染图氏窄口螺，在其体中发育的全过程。

The larval preference on Porites and the adult recognition of coral tissues are mechanism of host specificity.

幼生会选择微孔珊瑚以及成螺有辨识微孔珊瑚的能力是造成紫口珊瑚螺分布专一性的机制，此外成螺辨识微孔珊瑚的能力是受到珊瑚组织的影响。

Early sex change of solitary snails can explain the small size of females on branching Porites in contract to the massive Porites.

推测在分枝状微孔珊瑚上紫口珊瑚螺大部分是单独存在其变性时间未受到其它雌螺的影响，因而造成较小个体的雌螺进而产生较差的生殖能力。

Haliotis asinina (Linnaeus, 1758), Tectus niloticus maximus (Philppi, 1844), Tectus pyramis (Born, 1778), Turbo argyrostomus Linnaeus, 1758, Turbo chryostomus (Linnaeus, 1758), Hippopus hippopus (Linnaeus, 1758), Tridacna maxima (Roeding, 1798), could be found but were in low abundance.

此外，东沙岛的大型经济性软体动物种类也不少，但数量都不多，本次纪录到的种类有驴耳鲍、马蹄钟螺、银塔钟螺、金口蠑螺、银口蠑螺、菱硨渠蛤、长硨渠蛤……等。

Haliotis asinina (Linnaeus, 1758), Tectus niloticus maximus (Philppi, 1844), Tectus pyramis (Born, 1778), Turbo argyrostomus Linnaeus, 1758, Turbo chryostomus (Linnaeus, 1758), Hippopus hippopus (Linnaeus, 1758), Tridacna maxima (Roeding, 1798), could be found but were in low abundance.

此外，东沙岛的大型经济性软体动物种类也不少，但数量都不多，本次纪录到的种类有驴耳鲍、马蹄钟螺、银塔钟螺、金口蝾螺、银口蝾螺、菱砗渠蛤、长砗渠蛤……等。

XD-2003 strap machine is changed from XD-2002 machine which has a cast aluminium on the bed,making the screw,screwtube and speed reducer keeping concentric.the V-model manger on the bed is lower than the flat on which the speed reducer is fixed,the components are finished machining by machine tool.guaranteeing perpendicularity, degree of balance.speed reducer,screw and screwtube is fixed on the base,and the screwtube is in the mini-manger,then ensuring axis keeping concentric with sheath,screwtube feed opening has a chromium hard-wearing sheath,which can improve the lifetime of the screw and screwtube to threefold or to fourfold.

XD-2003 型塑料打包带机组，是在XD-2002型机组的机座上安装了一个铸铁机座，使螺杆，螺筒和减速机保持同心，座上的V型槽比安装减速机的平面低，其部件都是经过机床精加工完成的，保证了垂直度和平衡度。减速机和螺杆、螺筒置于底座上，且螺筒卡在微型槽内。确保轴与套保持同心，螺筒下料口处设有高铬耐磨衬套，这样可使螺杆、螺筒的寿命提高3-4倍。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。