名詞 assay:

1. an appraisal of the state of affairs
   同義詞：check
2. a substance that is undergoing an analysis of its components
3. a written report of the results of an analysis of the composition of some substance
4. a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc.

動詞 assay:

1. analyze (chemical substances)
2. make an effort or attempt
   同義詞：try, seek, attempt, essay

1. After chemical assay, we have known the composition of the ore.
   經過化學分析，我們知道了礦石的構成。
2. We will make an assay of the ore that he brought.
   我們將對他帶來的礦石做實驗鑒定。

as.say

n.（名詞）

Qualitative or quantitative analysis of a substance, especially of an ore or drug, to determine its components.
化驗，分析：物質的定性或定量分析，尤指礦石或藥物，檢驗內含成份
A substance to be so analyzed.
被分析物，被化驗物：被化驗的物質
The result of such an analysis.
化驗報告，分析結果：這樣化驗的結果
An analysis or examination.
分析，檢驗
Archaic An attempt; an essay.
【古語】 嘗試；企圖
v.（動詞）
as.sayed,as.say.ing,as.says[2-s3., 2s.3.]
v.tr.（及物動詞）
To subject to chemical analysis.
化驗，分析：對…進行化學分析
To examine by trial or experiment; put to a test:
試驗，檢驗：通過試驗或考驗檢驗；檢驗：
例句：
assay one`s ability to speak Chinese.
檢驗某人講漢語的能力

To evaluate; assess:
評價；估價：
例句：
assayed the situation before taking action.See Synonyms at estimate
采取行動前先分析形勢參見 estimate

To attempt; try.
試圖；嘗試
v.intr.（不及物動詞）
To be shown by analysis to contain a certain proportion of usually precious metal.
經分析含有：經檢驗證明含某種比率的通常較貴重金屬

來源：
Middle English
中古英語
from Old French essai, assai * see essay
源自 古法語 essai, assai *參見 essay

【引伸】
assay.able
adj.（形容詞）
assay.er
n.（名詞）