它的振动幅度取决于引力场的强度。Its oscillation depends on the strength of the gravitational field.振动幅度的大小决定声音的大小.The amplitude of the vibration determines the loudness of the sound.膜片振动,这使得周围的空气也动荡起来.The diaphragm vibrates , thus setti...
A scent of honey wafted up from the hives.一股蜂蜜的香味从蜂房里飘上来.The scientist's experiments have thrown great light on the amazing ways honeybees communicate in their dark hives.这位科学家的实验很清楚地表明了在黑暗的蜂房里,蜜蜂是怎样以很巧妙的方式传递信息的.Bee...
A certain risk is involved when cereal grains are maturing in the field on the stalk.当谷物在田间茎秤上正在成熟时就蕴藏着一定的危险.If Brazier effect occurs on a stalk, it will bend after 25 % to 30 % of flexion.发生Brazier屈曲的茎在危险截面的屈曲程度为25%～30%...
From Cairo came expressions of regret at the attack.开罗对此次攻击表示遗憾。Cairo has only thirteen square centimetres of green space for each inhabitant.开罗居民的人均绿地面积仅13平方厘米。Cairo is the capital of Egypt.开罗是埃及的首都。...
Breathe out and ease your knees in toward your chest.呼气，膝部放松向胸部靠拢。Place your hands on the small of your back and breathe in.双手置于腰部，吸气。Hold your breath for a count of five, then slowly breathe out.屏住气息数五下，然后慢慢地呼气。...
Every vector can be resolved into covariant or into contravariant components.每个矢量都可以分解成协变分量或逆变分量.The covariant equation of plane motion body in curved space - time is studied.研究弯曲 时空 中平面运动刚体的动力学协变方程.This decomposition ma...