diff --git a/content/18.safety.md b/content/18.safety.md
index c35f99d3c3281f187bdeeba35e2997be169b4b04..c0ea156c836e3295f88e5e59c2317b600ff10385 100644
--- a/content/18.safety.md
+++ b/content/18.safety.md
@@ -17,7 +17,7 @@ Safety is a prerequisite for scientific experiments, and we attach great importa
 
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-The laboratory of Peking 2023 is a BSL-1 laboratory with more than 10 years of operating experience and complete experimental facilities, including biosafety cabinets and chemical fume hood. Laboratory safety is supervised by Associate Professor Qingsong Wang.
+The laboratory of Peking 2023 is a BSL-1 laboratory with more than 10 years of operating experience and complete experimental facilities, including biosafety cabinets and chemical fume hoods. Laboratory safety is supervised by Associate Professor Qingsong Wang.
 
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@@ -25,7 +25,7 @@ The laboratory of Peking 2023 is a BSL-1 laboratory with more than 10 years of o
 
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-At the beginning, Peking 2023 conducted a four-day laboratory professional training for all staff, learning laboratory safety rules, instrument operation, basic experimental skills, and emergency measures. Before conducting experiments independently, students need to be guided by experienced senior students to conduct experiments. In addition, Peking 2023 has established a laboratory management system and is equipped with an experienced safety officer. Specifically, we have the following measures (also mentioned in the safety form) :
+At the beginning, Peking 2023 conducted a four-day laboratory professional training for all staff, learning laboratory safety rules, instrument operation, basic experimental skills, and emergency measures. Before conducting experiments independently, students need to be guided by experienced senior students to conduct experiments. In addition, Peking 2023 has established a laboratory management system and is equipped with an experienced safety officer. Specifically, we have the following measures (also mentioned in the safety form):
 
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@@ -55,7 +55,7 @@ At the beginning, Peking 2023 conducted a four-day laboratory professional train
 
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-At the beginning of the project, Peking 2023 intended to select VNP20009(a strain of *Salmonella*) as our chassis due to its high affinity to tumor tissues. However, it is modified by a pathogenic bacterium, which is not conducive to our experimental operation and future applications.
+At the beginning of the project, Peking 2023 intended to select VNP20009 (a strain of *Salmonella*) as our chassis due to its high affinity to tumor tissues. However, it is modified by a pathogenic bacterium, which is not conducive to our experimental operation and future applications.
 
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@@ -70,7 +70,7 @@ Therefore, we chose *Escherichia coli* Nissle 1917 (EcN) as the main microbial c
 
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-Peking 2023 construct a diaminopimelic acid (DAP) auxotrophy recombinant bacterium strain by knocking out the *asd* gene of EcN, which encodes aspartate beta-semialdehyde dehydrogenase, a key enzyme in the biosynthesis pathway of DAP (the basic component of peptidoglycan on the cell wall). DAP is essential for the cell wall of EcN. It would die without exogenous DAP added, eliminating the possibility of leaky expression.
+Peking 2023 constructed a diaminopimelic acid (DAP) auxotrophy recombinant bacterium strain by knocking out the *asd* gene of EcN, which encodes aspartate beta-semialdehyde dehydrogenase, a key enzyme in the biosynthesis pathway of DAP (the basic component of peptidoglycan on the cell wall). DAP is essential for the cell wall of EcN. It would die without exogenous DAP added, eliminating the possibility of leaky expression.
 
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