His forearms, where the sleeves were rolled back, showed bulging muscles.是什么意思？

His forearms, where the sleeves were rolled back, showed bulging muscles.

他双袖上卷, 前臂显出隆起的肌肉.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

forearms

n. 前臂( forearm的名词复数 )；

例句
The kangaroo's forearms seem undeveloped but the powerful five - fingered hands are skilled at feinting and clouting.
袋鼠的前肢看似未完全发育,但其有力的五趾前足非常善于佯装攻击和击打动作.

where

adv. 哪里，在哪里，到哪里，某种情势或位置；conj. 在…的地方；n. 地方，场所；pron. 哪

例句
...a criminal proceeding where defendants have the right to confront their accusers.
被告有权与原告对质的一种刑事诉讼

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

sleeves

n. 衣服袖子( sleeve的名词复数 )，套管，套筒，唱片套；

例句
The sleeves covered his hands to the tips of his fingers...
袖子遮住了他的手，一直盖到指尖。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

rolled

adj. 包金箔的；v. （使）打滚( roll的过去式和过去分词 )，（使）转动，卷，把…卷成筒状；

例句
Hundreds of tightly rolled newspapers were set aflame among the 50,000 crowd.
几百张卷紧的报纸在为数5万的人群中被点燃。

back

n. 背，背部，背面，反面，后面，后部，（椅子等的）靠

例句
He looked back at the abject, silent girl and repeated his question.
他转过头看着这个噤若寒蝉的女孩，又重复了一遍他的问题。

showed

v. 给…看( show的过去式和过去分词 )，表现出，显露出，上演；

例句
He showed how the rich and powerful can abuse their position.
他让我们看到有钱有势的人是如何滥用其地位的。

bulging

n. 膨胀，凸出（部），打气，折皱；v. 凸出( bulge的现在分词 )，充满，塞满（某物）；

例句
Jiro waddled closer, his belly bulging and distended...
伊罗步履蹒跚地走近，肚子鼓胀凸出。

muscles

n. 肌肉( muscle的名词复数 )，（操纵他人的）力量，权力，肌肉组织；

例句
She could see the muscles of his shoulders beneath his T-shirt...
她可以看到他T恤衫下的肩部肌肉。