It is best to check the temperature of the water before diving in headfirst.
潜水前最好先检查水温。
Landing headfirst in the water, he felt his pulse quicken.
一头栽倒在水中后，他感觉到脉搏加快。
With its wry reporting and visual panache, Wired offers a headfirst dive into the tech world.
依靠其嘲讽的报道风格和绚丽的视觉效果，《连线》杂志绝对可以让你一头扎进科技世界。
Dad: Stop arguing. He went in headfirst.
爸爸：别吵了。他是头先进去的。
He lost his balance, and pitched out of the window headfirst.
他失去平衡，头朝下从窗子上跌了下去。
After being well-equipped, jumpers leap headfirst from Bridges, towers, cranes, and even hot-air balloons.
他们在戴好安全设施之后头朝下的从桥梁、高塔、起重机甚至是热气球上跳下。
The headfirst forward roll requires the rollers to press down with feet, jump, prop up with arms and roll consistently.
鱼跃前滚翻动作，要求蹬、跃、撑、滚连贯，腾空高，滚翻圆滑。
The baby usually turns upside down in the end, since its head is heaviest. Babies get born more easily if they come headfirst.
到后期的时候胎儿会转过来头朝下，因为他的头最重。如果胎儿的头先出来，就容易出生了。
A computer scientist at UCLA poses by a projected computer image of a skeleton diving headfirst down a staircase at his office.
加州大学洛杉矶分校一名计算机科学家站在办公室里的一个计算机动画投影旁，画面中一副骷髅沿着楼梯朝下俯冲。
Google yourself right now, and if the search produces 25 other people with your name -- but not you -- it's time to dive in headfirst.
试着搜索一下自己名字。如果搜索结果显示有25个人与你同名，但其中没有你，那你可得卯足劲努力了。
Consider this: it’s difficult to make yourself just jump headfirst into a new situation without working out some of the details ahead of time.
想一想：你很难做到在没有规划任何细节之前一头扎进一个你不熟悉的新环境。
Consider this: it’s difficult to make yourself just jump headfirst into a new situation without working out some of the details ahead of time.
想一想：你很难做到在没有规划任何细节之前一头扎进一个你不熟悉的新环境。
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