Presence or absence

 

Existence and inexistence

 

F: many important and well-understood chemical changes that occur in an isolated lipid may be modified by such factors as location of the lipid in a tissue system, the presence or absence of water, and the imposition of such stresses as heat or radiation.

 

 In turn      : 

 

   依此地 ( 两者常用于，实验试剂加 入、作用方式。)

 

 

 Respectively  :各自地

 

F： Differences in triglyceride composition affect physical properties, and this Differences in triglyceride composition affect physical properties, and this in turn greatly influences the use to which a given fat is put.

 

F： The simple sugars (monosaccharides0 are basically aliphatic polyhydroxy aldehydes and ketones: HOCH2- (CHOH) n-CHO and HOCH2- (CHOOH) n-1-C-O-Ch2OH, called “aldoses” and “ketoses,” respectively.

 

 

 

 

 

 

Concentrate :  富集

 

Condense in:   浓集于

 

F:  Fats and oils the most concentrated source or food energy.

 

F:  D-glucose and D-fructose, are condensing in such a way that their reactive functions are lost to form the disaccharide no reducing sugar, sucrose.

 

  

 

　

 

 

代替

Substitute for :

 

  Instead  of : 

 

Replace   :

 

F:  Cocoa butter, derived from the cocoa bean, is a fat preferred for confectionary uses it is usually in insufficient supply and is costly, so that many efforts have been made to substitute for it or to find suitable extenders.

 

F: The final “e” in the name of a hydrocarbon is replaced by “-oic

 

 

 

 

  English  experience

 

SOME GOOD SENTENCES：

 

1.  linseed oil contains up to 50% linolenic acid.  (up to 意为达到）

 

2.        They perform a function of energy storage in seeds, fruits of plants and animals.(起…的功能)                                                   

 

3.        This definition describes a broad group of substances that have some properties in common and have some compositional similarities. (group 作名词时，常作“基团、族”解)

 

 

 

 

4.        What we eat as well as how much we eat determine our nutrition status to an important extent, and influenced by a diversity of external and internal factors.( 很大程度上)

 

   Margarines, used mostly as table spreads and to some extent as cooking fats, are prepared by blending suitably prepared fats and oils with other ingredients.(某种程度上)