·2,447,543篇论文数据,部分数据来源于NoteExpress
N (in the Jewish calendar) the fifth month of the year according to biblical reckoning and the eleventh month in the civil year, usually falling within July and August (历法)阿布月; 即犹太教历五月和非宗教日历的每年第11个月份
Since 1914, scientists have known that birds flying in formation—a V-shape—expend less energy.
自1914年以来,科学家们已经知道,以V字形队形飞行的鸟类消耗的能量更少。
Canada geese flying in a V shape can fly seventy percent farther without having a rest than the birds flying alone.
与单独飞行的鸟类相比,以V形飞行的加拿大鹅在没有休息的情况下可以多飞行百分之七十的距离。
Canada geese flying in a V shape can fly seventeen percent farther without having a rest than the birds flying alone.
与单独飞行的鸟类相比,以 V 形飞行的加拿大鹅在没有休息的情况下可以多飞17%。
Also in Kenya, a video game is being tested as another way to teach young people to avoid H.I.V.
VOA: special.2009.03.16
D-A-V-I-D I'm not hardcoding in D-A-V-I-D anymore but I can still use a variable.
我不再把名字写死为,而是用一个变量来代替。
So if delta v is negative, in this case delta v is negative, OK, delta v is negative, pressure is a positive number, negative times negative is positive, work is greater than zero.
也就是当活塞,压缩气体的时候,做的功是正的,按照这一规定,我们需要在这里,加上一个负号,这是习惯规定。
应用推荐