"So once you have the size of the head, there is what researchers have called 'the 12 percent rule,'" he says.

一旦掌握了头部尺寸，然后有一条‘百分之十二原则’。

youdao

Brush size is up to you but I like to start off with one at least the size of the head of the character in the image.

笔刷大小就看您的了，但我想刚开始时至少有一个规模的头部的性质的形象。

youdao

Large ears usually cannot be lifted correctly off the head, and even if lifted, they will be out of proportion to the size of the head.

耳朵过大，通常无法举起，即使能举起，它们的尺寸与头部的比例也不协调。

youdao

She will sell you a cowboy hat made to fit the exact size of your head.

VOA: special.2009.02.16

As little as 500 micrograms, the size of the head of a pin, can kill an adult if inhaled or ingested.

NPR: FBI: Arrest Made In Wash. State Ricin Letter Scare

As little as 500 micrograms -- an amount the size of the head of a pin -- can kill an adult.

CNN: SHARE THIS

Engineers also developed a new engine and increased the size of the print head to help increase print speeds.

ENGADGET: Brother crams all-in-one functionality into a pint-size package for Business Smart series