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e40540
p10-5
Oracle Database uses SCNs to mark the SCN
before which all changes are known to be on disk so that recovery avoids applying unnecessary redo.
The database also uses SCNs to mark the point
at which no redo exists for a set of data so that recovery can stop.
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例句
There are several additional implementation classes
, that can be used together with the ones provided by Java.
非限定性定語從句
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例句
e40540 17-19
For example, a SQL statement
that directly accesses a remote target through a gateway
can concatenate two columns as part of the SELECT statement.
最後判斷是同位語從句，而不是定語從句。
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例句
This feature efficiently identifies and captures data
that has been added to, updated in, or removed from, relational tables
and makes this change data available for use by applications or individuals.
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this is the number of packets that tcpdump has received and processed
賓語從句
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例句
the meaning of this depends
on the OS on which you're running tcpdump,
and
possibly on the way the OS was configured
兩個並列定語從句
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例句
The chapter also describes the dynamic performance views, which are special views that are continuously updated while a database is open and in use.
語法分析
定語從句巢狀了一個讓步狀語從句
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例句
An important part of an Oracle database is its data dictionary, which is a read-only set of tables that provides administrative metadata about the database.
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例句
this is very likely to cause an error
詞法分析
句法分析
首先，分塊
this
is very likely
very(很，adv) likely(adv,(很)可能 [前面常有 more, quite 或 very 等修飾])，
副詞修飾副詞，結果是副詞作表語
to cause an error.
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例句
the standard way to prevent this is to enclose the entire real contents of the file in a conditional.
詞法分析
句法分析
首先，分塊
the standard way to prevent this 主語
is to enclose 系動詞加表語
the entire real contents of the file in a conditional.
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例句
In the past,it has been abused as a text processor.
語法分析
完成時態，as作介詞使用
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例句
It will choke on input which does not obey C's lexical rules.
語法分析
將來時態包含了一個某個從句（暫時無法判斷）
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simply learning,simply best
本義
simply adv.
learning 動名詞還是現在分詞不太確定
best 形容詞，副，名，動
此句解析：
副詞simply修飾（好像是現在分詞）learing，副詞simply修飾形容詞best
簡單學習，簡單最好
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