1、词根精讲
Ject comes from jacere, the Latin verb meaning "throw" or "hurl"
词根ject来自拉丁语动词，意思是“扔”，“投”。
2、同根词汇
1. jet: an airplane powered by one or more jet engines 喷气式飞机。（单词jet是词根ject的变体）
李连杰的英文名就叫做Jet Lee.一方面Jet跟跟他的名“杰”谐音，另一方面“jet”喷气式飞机也比喻事业一飞冲天，既做到了谐音，又做到了谐意。
2. inject: to force (a liquid) into something [ in(=into)入，进入，里面，ject(=throw)扔，→ 把东西扔进 → 把液体扔进身体里→]
v.注射（液体、药等）；注入
inject new life into the company 给公司注入新的活力
3. reject: to refuse to accept, consider, submit to, take for some purpose, or use [ re(=back)回，ject(=throw)扔，→ 把东西扔回 ] v.拒绝；驳回；舍弃（投掷回来）
My teacher rejected my excuse for being late.
4. eject: to force (someone) to leave [ex=out 向外，ject(=throw)扔，→ 把东西往外扔 ] vt. 逐出，驱逐；喷射（液体等），吐出
After committing 5 fouls,a basketball player is ejected from the game.
篮球选手犯规五次就要被罚下赛场。
5. interject: to interrupt what someone else is saying with (a comment, remark, etc.) [inter(=between)在...之间,ject 扔 → 在某人交流时把话扔向他们，打断他们的交流 →] v. 打断
6. conjecture [带着某物扔con=together共同，ject=throw扔。所以conjecture字面上的意思是把数据和事实集合在一起，从而生成理论]
n. 猜测，推测; 臆测 v. 猜测，推测
Without any scientific data, the best he could do was conjecture . 由于没有任何科学资料，他至多只能推测。
7. trajectory: [tra=trans=across, ject=throw] n. 弹道；抛物线（由一端把投到另一端的线路）
8. project: [pro 向前, ject=throw，向前投] v.发射，放映，呈现，展现
n. 项目，计划（需要展现出来的）