Medullary substance
[醫(yī)] 髓質(zhì)
?? 詞語組成解析
a. 骨髓的, 髓質(zhì)的, 延髓的\\n[醫(yī)] 髓的, 髓狀的
substance
['s?bst?ns]
n. 物質(zhì)，材料;實(shí)質(zhì)，內(nèi)容;[神]靈;（織品的）質(zhì)地;
sub下面+st站立+ance表名詞→站在下面的東西→物質(zhì)；本質(zhì)
??? 情景例句
You can watch the web-cast of this program if you have broadband access to the internet.
如果你能用寬帶上網(wǎng)的話，你能在網(wǎng)上收看到這個(gè)節(jié)目。
He went to the post office to mail a letter.
他去了郵局寄信。
OK. Could you take it to the classroom?
好，那你能搬到教室里嗎？