大大的的英文：
root and branch; smart

参考例句：

To hit the ceiling
大大生气

The stomachs of starving people often distend.
饥民的腹部常鼓得大大的。

The cooking of foods markedly aids digestion of starch by breaking down the solubilizing the starch granules
煮熟的饲料使淀粉颗粒破裂和溶解，大大有利于消化。

This relationship was severely attenuated when differences in social class were taken into account
这种关系在考虑了社会阶级差异后就大大削弱了。

Rudolph looked dazed and his eyes widened when he saw the welt on Thomas's cheek
鲁道夫一看见托马斯脸颊上的伤痕，就露出茫然的神色，两眼睁得大大的。

We owed the Shah a great deal for his unflagging loyalty during the October War.
我们应当大大感谢伊朗国王在十月战争期间表现的始终不渝的忠诚。

The situation has been greatly transformed.
形势已经大大好转。

A very praiseworthy achievement
值得大大夸奖的成绩.

The postage must be much lower.
邮资必须大大降低。

Radio traffic has stepped up enormously.
无线电通讯已大大增加。

root是什么意思：
n. 根；根源；根基；词根；祖先
v. 生根；根源在于，来源于

nematode damage to the soybean roots is characterized by coarse roots
线虫破坏大豆根系的特征是:根系粗糙。

These plants have very deep roots.
这些植物的根长得很深。

Hope is the root of hopeful.
hope是hopeful的词根。

branch是什么意思：
n. 树枝；旁系；支流；分部；分支
v. 分支；出枝；派生
adj. 树枝的；分支的

The acoustics is a branch of physical.
声学是物理学的一个分支。

optimization of branch instruction
转移指令优化

branch or skip on condition
条件转移或跳越 - 指令

smart是什么意思：
adj. 伶俐的，漂亮的，整洁的
v. 感到痛苦；遭殃
n. 痛苦；剧痛

These are smart missiles.
这些是导引导弹。

She's smart,but her brother is just as smart.
她很聪明，但她兄弟也一样聪明。

Smart products have a memory
聪明的软件有记忆