体壁有外环形肌和内纵行肌.The body wall has outer circular and inner longitudinal muscles.用伊红和 马洛赖氏 三色法染色可见体壁尤其在腹壁的折叠处及膜翅壁中存在着胶原纤维.There are collagenous fiber in integument especially integument and the hymenopterous integument disco...
Vivi : It must be the sashimi. They did not taste fresh enough.一定是那生鱼片, 他们尝起来不够新鲜!I tried both sushi and sashimi but I prefer sushi.寿司和生鱼片我都吃了,但是我更喜欢吃寿司.Daniel: I love sashimi. Did mom bring any soy sauce for that?丹尼尔: 我...
Oil - yielding organic matter is contained in the shales.在这些页岩里有产油的有机物质.Thus clays and shales tend to be impermeable.因此粘土和页岩就往往不透水.Sandstones are, as a rule , interbedded with shales.砂岩通常都与页岩互层.Alternating sandstones and...
The diamond towns are gradually being reclaimed by the desert...这些钻石城镇正逐渐重归沙漠。This necessitates subdivision of the area to be reclaimed.这就必须划分要改良的面积.Estonia reclaimed its independence and seceded from the Soviet Union.爱沙...