_______length of _________ sperm whale is 15M横线里填什么?

行程长度
双语对照
词典结果：
length of stroke
[英][leŋθ ɔv strəuk][美][lɛŋkθ ʌv strok]
冲程（长度）;
以上结果来自金山词霸
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例句:
1.
Su tung yi,"said:" tiger,the length of the animals are able to perform stroke,down sharply and ate food,ghosts.
《习俗通义》中说：“虎,百兽之长也,能执搏,挫锐,噬食,鬼魅.”

你看看,这样给出来回答,是否更易于你理解?
这些绳子的长度都是3米：
【The length 主语,单数】【 of these strings/ropes/cords介词短语,定语】【is谓语】 【three metres 表语】.
祝你学习进步,时时开心!O(∩_∩)O~~

esidence time 居住时间
eg
居住时间以及年龄的差异,并不会影响到生活圈指认的数量,但是却影响对於不同生活圈的熟悉度.
The differences of residence time and age will not influence the quantity that theliving circle appoints,but these differences would influence the familiarity towardsdifferent living circles.