重点讲解：

choke
vt. 呛；使窒息；阻塞；抑制；扑灭
vi. 窒息；阻塞；说不出话来
n. 窒息；噎；[动力] 阻气门
A small child could choke on the doll's hair.
小孩子可能会因玩具娃娃的头发而窒息。
Dense smoke swirled and billowed, its rank fumes choking her.
浓密的烟雾盘旋翻腾，刺鼻的烟味使她窒息。
simultaneous
adj. 同时的；联立的；同时发生的
n. 同时译员
The conference hall is provided with facilities for simultaneous interpretation in five languages.
这个会议大厅配有五种语言的同声传译设备。
This event was almost simultaneous with that one.
这件事几乎是与那件事同时发生的。
genetical
adj. 遗传的；起源的；创始的
Each part of seed has its own genetical information for esterase biosynthesis which may be similar or not.
种子的每一部分都有由各自的相同或不相同的酯酶生物台成的遗传信息。
In addition, the possibility of applying the grey relational grade analysis to genetical breeding of cotton has been discussed.
讨论了灰色关联度分析在棉花遗传育种中运用的可能性。

美国文化：