only a few vertebrates besides humans copulate face to face.
只有包括人类在内的某些脊椎动物是面对面的进行交合的。
the intramedullary nail is mainly characterized by including a solid nail body, the upper section of which is an external screw thread rod and a copulate fixedly pressure-adding screw cap;
它的主要特征是包括实心体钉体,其上段为外螺纺桿及配合的固定加压螺帽;
on assembling aspect, especially on auto-assemble, it is to prevent interposition and conflict of copulate parts due to burr.
在装配方面,防止因毛刺存在造成配合零件间的干涉和卡死,特别是在自动装配中尤其重要。
only a few vertebrates besides humans copulate face to face. among those that sometimes do this: hamsters, beavers, and some primates, such as bonobos and orangutans.
ninety-seven percent of all mammal species operate their love lives entirely on this signal. they copulate to the point of disinterest, and then they move on.
even though there is a lavish wedding ceremony complete with booze and dancing, the girl is not expected to copulate with the animal – which is good news!